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Joe Iwanaga - One of the best experts on this subject based on the ideXlab platform.

  • an unusual Anatomical Variation of the inferior alveolar nerve
    Anatomy & Cell Biology, 2020
    Co-Authors: Joe Iwanaga, Shogo Maekawa, Mizuki Nagata, Yuki Matsushita, Shane R Tubbs
    Abstract:

    A number of studies have previously shown Variations of inferior alveolar, however, only a few reports focused on nearby the foramen ovale. In a formalin fixed cadaver, we identified three minor branches (anterior, middle, and posterior branches) arising from the main trunk of the mandibular nerve adjacent to the foramen ovale, passing lateral to the maxillary artery (MA), and joining the inferior alveolar nerve. The diameter of the branches was 0.68 mm, 1.43 mm, and 0.40 mm, respectively. The branches traveled inside the lateral pterygoid muscle (LPM) or between the LPM and tensor/levator veli palatini. Moreover, all of the branches were superficial to MA. Knowledge of such a Variation might be helpful to dentists during, for example, anesthetic blockade and various oral surgeries.

  • Supernumerary incisive canals in a cadaver: a rare Anatomical Variation
    Surgical and Radiologic Anatomy, 2019
    Co-Authors: Shogo Kikuta, Joe Iwanaga, Jingo Kusukawa, R. Shane Tubbs
    Abstract:

    We present a rare Anatomical Variation in which an additional incisive canal was observed during the routine dissection of the palatal region in a cadaver. The diameter of the incisive and additional incisive canals measured 4.59 mm and 0.91 mm, respectively. Even though this Variation is rare, oral surgeons should be aware of such Anatomical Variations for a better understanding.

Hee Kyu Kwon - One of the best experts on this subject based on the ideXlab platform.

Anders Fuglsangfrederiksen - One of the best experts on this subject based on the ideXlab platform.

  • misinterpretation of sural nerve conduction studies due to Anatomical Variation
    Clinical Neurophysiology, 2014
    Co-Authors: Hatice Tankisi, Kirsten Pugdahl, Marit Otto, Anders Fuglsangfrederiksen
    Abstract:

    Abstract Objective Anatomical Variation of the sural nerve has been documented in numerous cadaver studies. The sural nerve conduction parameters can potentially be influenced by the sural nerve type A formation formed by the union of the medial sural cutaneous nerve (MSCN) and the peroneal communicating branch (PCB) and the type C formation with the sural nerve formed solely by the PCB. Methods In 17 out of 240 prospectively examined subjects referred for polyneuropathy a suspicion of an Anatomical Variation of the sural nerve was raised due to decreased amplitude or substantial side-to-side Variation (>50%) of the sensory nerve action potential (SNAP) in disproportion to the clinical findings. To verify the Variation the sural nerve was examined further with surface electrodes and near-nerve technique, including extra lateral and distal needle placements. Results In all 17 subjects an Anatomical Variation affecting the sural SNAP was confirmed as a normal sural SNAP could be obtained by changing the electrode placement. The most frequent Variation, seen in 15 subjects, was a type A formation with union of the MSCN and the PCB distally at low calf, while a type C formation was seen in 2 subjects. Conclusions In case of a decreased sural SNAP amplitude or substantial side-to-side Variation in disproportion to the neurologic evaluation, an Anatomical Variation instead of pathology could be suspected and a different electrode placement be considered. Significance Neurophysiologists should be aware of different types of formations of the sural nerve which may cause misinterpretations of nerve conduction studies, especially when needle electrodes are used.

Sung Bom Pyun - One of the best experts on this subject based on the ideXlab platform.

Yasuki Kihara - One of the best experts on this subject based on the ideXlab platform.

  • flow mediated vasodilation and Anatomical Variation of the brachial artery double brachial artery in healthy subjects and patients with cardiovascular disease
    Circulation, 2013
    Co-Authors: Yuichi Fujii, Hiroki Teragawa, Junko Soga, Naomi Idei, Noritaka Fujimura, Tatsuya Maruhashi, Shinsuke Mikami, Yumiko Iwamoto, Takayuki Hidaka, Yasuki Kihara
    Abstract:

    Background: The purpose of this study was to evaluate the effect of Anatomical Variation of the brachial artery on flow-mediated vasodilation (FMD) in healthy subjects and patients with cardiovascular disease (CVD). Methods and Results: There was no significant difference in the prevalence of double brachial artery between healthy subjects (6.1%) and patients with CVD (6.5%). In healthy subjects, FMD was larger in a single brachial artery than in large and small vessels of a double brachial artery (7.2±3.4% vs. 4.7±3.3% and 4.5±2.5%, P<0.01, respectively). In patients with CVD, there were no significant differences in FMD among a single brachial artery, large vessel of a double brachial artery and small vessel of a double brachial artery (3.3±1.4%, 3.1±2.3% and 3.6±2.1%). FMD in a single brachial artery was smaller in patients with CVD than in healthy subjects. There were no significant differences in FMD in the large vessel of a double brachial artery between the 2 groups or in the small vessel of a double brachial artery between the 2 groups. Nitroglycerine-induced vasodilation was similar in all arteries in healthy subjects and patients with CVD. Conclusions: When measuring FMD, the existence of a double brachial artery should be checked. FMD measured in a double brachial artery may be underestimated in healthy subjects.  (Circ J 2013; 77: 1073–1080)

  • Flow-Mediated Vasodilation and Anatomical Variation of the Brachial Artery (Double Brachial Artery) in Healthy Subjects and Patients With Cardiovascular Disease
    Circulation, 2012
    Co-Authors: Yuichi Fujii, Hiroki Teragawa, Junko Soga, Naomi Idei, Noritaka Fujimura, Tatsuya Maruhashi, Shinsuke Mikami, Yumiko Iwamoto, Takayuki Hidaka, Yasuki Kihara
    Abstract:

    Background: The purpose of this study was to evaluate the effect of Anatomical Variation of the brachial artery on flow-mediated vasodilation (FMD) in healthy subjects and patients with cardiovascular disease (CVD). Methods and Results: There was no significant difference in the prevalence of double brachial artery between healthy subjects (6.1%) and patients with CVD (6.5%). In healthy subjects, FMD was larger in a single brachial artery than in large and small vessels of a double brachial artery (7.2±3.4% vs. 4.7±3.3% and 4.5±2.5%, P