The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Gonneke Willemse - One of the best experts on this subject based on the ideXlab platform.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic effects of task difficulty and task order
Biological Psychology, 2000Co-Authors: Gonneke Willemse, Christophe Ring, Sam Mckeeve, Douglas CarrollAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular activity were measured at rest and during Mental Arithmetic. Task difficulty was manipulated by presenting easy, hard, and impossible versions of the Mental Arithmetic task in counterbalanced order, while task novelty was operationalised as order of presentation (i.e. first, second, third). Mental Arithmetic elicited significant increases in sIgA concentration and sIgA secretion rate, as well as significant cardiovascular effects. Performance decreased and rated difficulty increased with increasing task difficulty. However, sIgA and cardiovascular activity, with the exception of diastolic blood pressure, were insensitive to variations in task difficulty. In contrast, sIgA concentration and a broad range of cardiovascular variables were influenced by task novelty, with more pronounced activity characterising the task version presented first, irrespective of its level of difficulty. Task novelty would seem to be a more important determinant of sIgA and cardiovascular activity than task difficulty.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic and paced breathing
Psychophysiology, 1999Co-Authors: Christophe Ring, Gonneke Willemse, Douglas Carroll, Jonatha Cooke, Adria Ferraro, Mark T DraysoAbstract:The role of the autonomic nervous system in secretory immunoglobulin A (sIgA) responses to laboratory challenge was explored in a study in which sIgA and cardiovascular activity were recorded at rest and during Mental Arithmetic and paced breathing. These tasks were selected to preferentially engage the sympathetic and parasympathetic nervous systems, respectively. Mental Arithmetic elicited a mixed pattern of increased alpha- and beta-adrenergic activity and a reduction in parasympathetic activity; diastolic blood pressure, total peripheral resistance, and systolic blood pressure increased, preejection period shortened, and heart rate variability decreased. In contrast, paced breathing primarily elicited an increase in parasympathetic activity; heart rate variability increased. Mental Arithmetic also provoked an increase in sIgA concentration but no change in saliva volume, whereas paced breathing affected neither sIgA concentration nor saliva volume. These data suggest that sIgA responses to laboratory challenges are mediated by sympathetic rather than parasympathetic processes.
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secretory immunoglobulin a and cardiovascular reactions to Mental Arithmetic and cold pressor
Psychophysiology, 1998Co-Authors: Gonneke Willemse, Christophe Ring, Douglas Carroll, Phil Evans, Angela Clow, Frank HucklebridgeAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular reactions to Mental Arithmetic and cold pressor tasks were recorded in 16 healthy young men on two sessions, 4 weeks apart. Both tasks elicited significant increases in sIgA secretion rate, reflecting increases in both salivary volume and sIgA concentration. Whereas Mental Arithmetic elicited a mixed pattern of alpha- and beta-adrenergic cardiovascular reactions, the pattern of reactions to cold pressor was predominantly alpha-adrenergic. Task levels of sIgA secretion rate, sIgA concentration, and saliva volume showed moderate to high test-retest reliability (r = .52-.83), although test-retest correlations were less impressive for change scores (r = -.19-.53). The pattern of correlations between change in sIgA secretion rate and cardiovascular reactivity variables was inconsistent.
Douglas Carroll - One of the best experts on this subject based on the ideXlab platform.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic effects of task difficulty and task order
Biological Psychology, 2000Co-Authors: Gonneke Willemse, Christophe Ring, Sam Mckeeve, Douglas CarrollAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular activity were measured at rest and during Mental Arithmetic. Task difficulty was manipulated by presenting easy, hard, and impossible versions of the Mental Arithmetic task in counterbalanced order, while task novelty was operationalised as order of presentation (i.e. first, second, third). Mental Arithmetic elicited significant increases in sIgA concentration and sIgA secretion rate, as well as significant cardiovascular effects. Performance decreased and rated difficulty increased with increasing task difficulty. However, sIgA and cardiovascular activity, with the exception of diastolic blood pressure, were insensitive to variations in task difficulty. In contrast, sIgA concentration and a broad range of cardiovascular variables were influenced by task novelty, with more pronounced activity characterising the task version presented first, irrespective of its level of difficulty. Task novelty would seem to be a more important determinant of sIgA and cardiovascular activity than task difficulty.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic and paced breathing
Psychophysiology, 1999Co-Authors: Christophe Ring, Gonneke Willemse, Douglas Carroll, Jonatha Cooke, Adria Ferraro, Mark T DraysoAbstract:The role of the autonomic nervous system in secretory immunoglobulin A (sIgA) responses to laboratory challenge was explored in a study in which sIgA and cardiovascular activity were recorded at rest and during Mental Arithmetic and paced breathing. These tasks were selected to preferentially engage the sympathetic and parasympathetic nervous systems, respectively. Mental Arithmetic elicited a mixed pattern of increased alpha- and beta-adrenergic activity and a reduction in parasympathetic activity; diastolic blood pressure, total peripheral resistance, and systolic blood pressure increased, preejection period shortened, and heart rate variability decreased. In contrast, paced breathing primarily elicited an increase in parasympathetic activity; heart rate variability increased. Mental Arithmetic also provoked an increase in sIgA concentration but no change in saliva volume, whereas paced breathing affected neither sIgA concentration nor saliva volume. These data suggest that sIgA responses to laboratory challenges are mediated by sympathetic rather than parasympathetic processes.
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secretory immunoglobulin a and cardiovascular reactions to Mental Arithmetic and cold pressor
Psychophysiology, 1998Co-Authors: Gonneke Willemse, Christophe Ring, Douglas Carroll, Phil Evans, Angela Clow, Frank HucklebridgeAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular reactions to Mental Arithmetic and cold pressor tasks were recorded in 16 healthy young men on two sessions, 4 weeks apart. Both tasks elicited significant increases in sIgA secretion rate, reflecting increases in both salivary volume and sIgA concentration. Whereas Mental Arithmetic elicited a mixed pattern of alpha- and beta-adrenergic cardiovascular reactions, the pattern of reactions to cold pressor was predominantly alpha-adrenergic. Task levels of sIgA secretion rate, sIgA concentration, and saliva volume showed moderate to high test-retest reliability (r = .52-.83), although test-retest correlations were less impressive for change scores (r = -.19-.53). The pattern of correlations between change in sIgA secretion rate and cardiovascular reactivity variables was inconsistent.
Christophe Ring - One of the best experts on this subject based on the ideXlab platform.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic effects of task difficulty and task order
Biological Psychology, 2000Co-Authors: Gonneke Willemse, Christophe Ring, Sam Mckeeve, Douglas CarrollAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular activity were measured at rest and during Mental Arithmetic. Task difficulty was manipulated by presenting easy, hard, and impossible versions of the Mental Arithmetic task in counterbalanced order, while task novelty was operationalised as order of presentation (i.e. first, second, third). Mental Arithmetic elicited significant increases in sIgA concentration and sIgA secretion rate, as well as significant cardiovascular effects. Performance decreased and rated difficulty increased with increasing task difficulty. However, sIgA and cardiovascular activity, with the exception of diastolic blood pressure, were insensitive to variations in task difficulty. In contrast, sIgA concentration and a broad range of cardiovascular variables were influenced by task novelty, with more pronounced activity characterising the task version presented first, irrespective of its level of difficulty. Task novelty would seem to be a more important determinant of sIgA and cardiovascular activity than task difficulty.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic and paced breathing
Psychophysiology, 1999Co-Authors: Christophe Ring, Gonneke Willemse, Douglas Carroll, Jonatha Cooke, Adria Ferraro, Mark T DraysoAbstract:The role of the autonomic nervous system in secretory immunoglobulin A (sIgA) responses to laboratory challenge was explored in a study in which sIgA and cardiovascular activity were recorded at rest and during Mental Arithmetic and paced breathing. These tasks were selected to preferentially engage the sympathetic and parasympathetic nervous systems, respectively. Mental Arithmetic elicited a mixed pattern of increased alpha- and beta-adrenergic activity and a reduction in parasympathetic activity; diastolic blood pressure, total peripheral resistance, and systolic blood pressure increased, preejection period shortened, and heart rate variability decreased. In contrast, paced breathing primarily elicited an increase in parasympathetic activity; heart rate variability increased. Mental Arithmetic also provoked an increase in sIgA concentration but no change in saliva volume, whereas paced breathing affected neither sIgA concentration nor saliva volume. These data suggest that sIgA responses to laboratory challenges are mediated by sympathetic rather than parasympathetic processes.
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secretory immunoglobulin a and cardiovascular reactions to Mental Arithmetic and cold pressor
Psychophysiology, 1998Co-Authors: Gonneke Willemse, Christophe Ring, Douglas Carroll, Phil Evans, Angela Clow, Frank HucklebridgeAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular reactions to Mental Arithmetic and cold pressor tasks were recorded in 16 healthy young men on two sessions, 4 weeks apart. Both tasks elicited significant increases in sIgA secretion rate, reflecting increases in both salivary volume and sIgA concentration. Whereas Mental Arithmetic elicited a mixed pattern of alpha- and beta-adrenergic cardiovascular reactions, the pattern of reactions to cold pressor was predominantly alpha-adrenergic. Task levels of sIgA secretion rate, sIgA concentration, and saliva volume showed moderate to high test-retest reliability (r = .52-.83), although test-retest correlations were less impressive for change scores (r = -.19-.53). The pattern of correlations between change in sIgA secretion rate and cardiovascular reactivity variables was inconsistent.
Frank Hucklebridge - One of the best experts on this subject based on the ideXlab platform.
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secretory immunoglobulin a and cardiovascular reactions to Mental Arithmetic and cold pressor
Psychophysiology, 1998Co-Authors: Gonneke Willemse, Christophe Ring, Douglas Carroll, Phil Evans, Angela Clow, Frank HucklebridgeAbstract:Secretory immunoglobulin A (sIgA) in saliva and cardiovascular reactions to Mental Arithmetic and cold pressor tasks were recorded in 16 healthy young men on two sessions, 4 weeks apart. Both tasks elicited significant increases in sIgA secretion rate, reflecting increases in both salivary volume and sIgA concentration. Whereas Mental Arithmetic elicited a mixed pattern of alpha- and beta-adrenergic cardiovascular reactions, the pattern of reactions to cold pressor was predominantly alpha-adrenergic. Task levels of sIgA secretion rate, sIgA concentration, and saliva volume showed moderate to high test-retest reliability (r = .52-.83), although test-retest correlations were less impressive for change scores (r = -.19-.53). The pattern of correlations between change in sIgA secretion rate and cardiovascular reactivity variables was inconsistent.
Mark T Drayso - One of the best experts on this subject based on the ideXlab platform.
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secretory immunoglobulin a and cardiovascular activity during Mental Arithmetic and paced breathing
Psychophysiology, 1999Co-Authors: Christophe Ring, Gonneke Willemse, Douglas Carroll, Jonatha Cooke, Adria Ferraro, Mark T DraysoAbstract:The role of the autonomic nervous system in secretory immunoglobulin A (sIgA) responses to laboratory challenge was explored in a study in which sIgA and cardiovascular activity were recorded at rest and during Mental Arithmetic and paced breathing. These tasks were selected to preferentially engage the sympathetic and parasympathetic nervous systems, respectively. Mental Arithmetic elicited a mixed pattern of increased alpha- and beta-adrenergic activity and a reduction in parasympathetic activity; diastolic blood pressure, total peripheral resistance, and systolic blood pressure increased, preejection period shortened, and heart rate variability decreased. In contrast, paced breathing primarily elicited an increase in parasympathetic activity; heart rate variability increased. Mental Arithmetic also provoked an increase in sIgA concentration but no change in saliva volume, whereas paced breathing affected neither sIgA concentration nor saliva volume. These data suggest that sIgA responses to laboratory challenges are mediated by sympathetic rather than parasympathetic processes.