Habenular Commissure

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C. L. Truwit - One of the best experts on this subject based on the ideXlab platform.

  • CLINICAL REPORT PEDIATRICS Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating
    2016
    Co-Authors: Term-neonatal Myelination, A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4 % of all structures) and interobserver agreement ( 0.546, P .0001) than spin-echo–T2WI (58.2%–64.8%; 0.468, P .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; 0.384, P .0001). Both observers noted that the following structures were myelinated in 88%–100 % of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100 % of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI

  • Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating Term-Neonatal Myelination
    AJNR. American journal of neuroradiology, 2014
    Co-Authors: A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4% of all structures) and interobserver agreement (κ = 0.546, P < .0001) than spin-echo–T2WI (58.2%–64.8%; κ = 0.468, P < .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; κ = 0.384, P < .0001). Both observers noted that the following structures were myelinated in 88%–100% of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100% of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI. BIC : brachium of the inferior colliculus CST : corticospinal tracts DSCP : decussation of the superior cerebellar peduncle GRE : gradient recalled-echo ICP : inferior cerebellar peduncle PLIC : posterior limb of the internal capsule SCP : superior cerebellar peduncle SE : spin-echo

Mimi Halpern - One of the best experts on this subject based on the ideXlab platform.

  • Efferents and Centrifugal Afferents of the Main and Accessory Olfactory Bulbs in the Snake Thamnophis sirtalis
    Brain behavior and evolution, 1998
    Co-Authors: Enrique Lanuza, Mimi Halpern
    Abstract:

    This study reinvestigates the efferent projections of the main and accessory olfactory bulbs and describes for the first time the centrifugal projections to the main and accessory olfactory bulbs in the snake Thamnophis sirtalis, using the intraaxonal transport of the anterograde and retrograde tracer biotinylated dextran amine and the retrograde tracer horseradish peroxidase. The olfactory projection consists of three tracts: the lateral olfactory tract, which projects bilaterally to the lateral cortex and the rostral amygdala, crossing the midline through the stria medullaris-Habenular Commissure system; the intermediate olfactory tract, which projects ipsilaterally to the olfactory tubercle and contributes to the contralateral projection; and the medial olfactory tract, which projects ipsilaterally to the dorsomedial retrobulbar formation. The vomeronasal projection is formed by a single tract, the accessory olfactory tract, that projects ipsilaterally to the nucleus of the accessory olfactory tract, the medial amygdala and the nucleus sphericus. The centrifugal projections to the main and accessory olfactory bulb are composed of two components: one that arises in areas that receive the olfactory or vomeronasal input (neurons in the olfactory tubercle, retrobulbar formation and lateral cortex project to the main olfactory bulb; and neurons in the nucleus of the accessory olfactory tract, the medial amygdala and the nucleus sphericus project to the accessory olfactory bulb), and another that arises in areas not directly implicated in processing the chemosensory information (the nucleus of the diagonal band of Broca and the dorsal cortex). These data allow the recognition of the general pattern of organization of the reptilian olfactory and vomeronasal systems.

A. E. Tyan - One of the best experts on this subject based on the ideXlab platform.

  • CLINICAL REPORT PEDIATRICS Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating
    2016
    Co-Authors: Term-neonatal Myelination, A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4 % of all structures) and interobserver agreement ( 0.546, P .0001) than spin-echo–T2WI (58.2%–64.8%; 0.468, P .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; 0.384, P .0001). Both observers noted that the following structures were myelinated in 88%–100 % of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100 % of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI

  • Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating Term-Neonatal Myelination
    AJNR. American journal of neuroradiology, 2014
    Co-Authors: A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4% of all structures) and interobserver agreement (κ = 0.546, P < .0001) than spin-echo–T2WI (58.2%–64.8%; κ = 0.468, P < .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; κ = 0.384, P < .0001). Both observers noted that the following structures were myelinated in 88%–100% of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100% of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI. BIC : brachium of the inferior colliculus CST : corticospinal tracts DSCP : decussation of the superior cerebellar peduncle GRE : gradient recalled-echo ICP : inferior cerebellar peduncle PLIC : posterior limb of the internal capsule SCP : superior cerebellar peduncle SE : spin-echo

T. J. Hanson - One of the best experts on this subject based on the ideXlab platform.

  • CLINICAL REPORT PEDIATRICS Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating
    2016
    Co-Authors: Term-neonatal Myelination, A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4 % of all structures) and interobserver agreement ( 0.546, P .0001) than spin-echo–T2WI (58.2%–64.8%; 0.468, P .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; 0.384, P .0001). Both observers noted that the following structures were myelinated in 88%–100 % of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100 % of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI

  • Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating Term-Neonatal Myelination
    AJNR. American journal of neuroradiology, 2014
    Co-Authors: A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4% of all structures) and interobserver agreement (κ = 0.546, P < .0001) than spin-echo–T2WI (58.2%–64.8%; κ = 0.468, P < .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; κ = 0.384, P < .0001). Both observers noted that the following structures were myelinated in 88%–100% of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100% of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI. BIC : brachium of the inferior colliculus CST : corticospinal tracts DSCP : decussation of the superior cerebellar peduncle GRE : gradient recalled-echo ICP : inferior cerebellar peduncle PLIC : posterior limb of the internal capsule SCP : superior cerebellar peduncle SE : spin-echo

A. M. Mckinney - One of the best experts on this subject based on the ideXlab platform.

  • CLINICAL REPORT PEDIATRICS Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating
    2016
    Co-Authors: Term-neonatal Myelination, A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4 % of all structures) and interobserver agreement ( 0.546, P .0001) than spin-echo–T2WI (58.2%–64.8%; 0.468, P .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; 0.384, P .0001). Both observers noted that the following structures were myelinated in 88%–100 % of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100 % of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI

  • Comparison of Spin-Echo and Gradient-Echo T1-Weighted and Spin-Echo T2-Weighted Images at 3T in Evaluating Term-Neonatal Myelination
    AJNR. American journal of neuroradiology, 2014
    Co-Authors: A. E. Tyan, A. M. Mckinney, T. J. Hanson, C. L. Truwit
    Abstract:

    SUMMARY: A prior clinical report of 3T MR imaging in subsequently healthy very premature neonates imaged at term-equivalent age found that both gradient recalled-echo–T1WI and spin-echo–T2WI showed higher rates of myelinated structures, compared with spin-echo–T1WI. The current study set out to assess those rates on the same sequences at 3T in term neonates and thus consisted of 16 term neonates with normal-appearing MR imaging findings who subsequently had normal findings at clinical follow-up. Two neuroradiologists independently assessed 19 structures in those infants on all 3 sequences. Gradient recalled-echo–T1WI showed a slightly higher rate of myelination (57.2%–72.4% of all structures) and interobserver agreement (κ = 0.546, P < .0001) than spin-echo–T2WI (58.2%–64.8%; κ = 0.468, P < .0001), while spin-echo–T1WI had the lowest myelination rate and agreement (25.0%–48.4%; κ = 0.384, P < .0001). Both observers noted that the following structures were myelinated in 88%–100% of patients on gradient recalled-echo–T1WI: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, Habenular Commissure, medial lemniscus, pyramidal decussation, posterior limb of the internal capsule, and superior cerebellar peduncle; on spin-echo–T2WI, there was myelination in 88%–100% of the following structures: the brachium of the inferior colliculus, decussation of the superior cerebellar peduncle, inferior cerebellar peduncle, medial lemniscus, and posterior limb of the internal capsule. In conclusion, this study confirmed that similar to the findings in term-equivalent-age premature infants, myelination changes in term neonates may be best assessed on both gradient recalled-echo–T1WI and spin-echo–T2WI at 3T, and not on spin-echo–T1WI. BIC : brachium of the inferior colliculus CST : corticospinal tracts DSCP : decussation of the superior cerebellar peduncle GRE : gradient recalled-echo ICP : inferior cerebellar peduncle PLIC : posterior limb of the internal capsule SCP : superior cerebellar peduncle SE : spin-echo

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