Heart rate and blood pressure responses of left-handers and right-handers to autonomic stressors.
Indian J Physiol Pharmacol
;
2004 Jan; 48(1): 31-40
Artículo
en Inglés
| IMSEAR
| ID: sea-108335
ABSTRACT
We hypothesized that cerebral dominance may contribute to differences in cardio-vascular responses of right-handers (RH) and left-handers (LH) to autonomic stressors. We tested this hypothesis by exposing 14 RH, and 14 LH males to category I tests in which the hand and cerebral cortex were involved in performing the test viz.--i) Cold pressor test (CPT), ii) Handgrip dynamometry (HGD) and; category II (no use of hand)--i) Orthostatic Tolerance Test (OTT), ii) Valsalva Manuever (VM), iii) Controlled Breathing Test for sinus arrhythmia (SA) in a random sequence, and measured their heart rate (HR/min) and blood pressure (MAP mmHg). All subjects had similar resting HR and MAP values, and responded to the category I interventions with increased HR and BP. The absolute HR values of LH and RH did not differ significantly during the interventions. However, the increase in HR from control induced by the CPT, and the HGD was greater for LH (P<0.05). Also, LH showed a greater decrease in HR and MAP in the recovery phase (P<0.05). The VAS scores for degree of discomfort during the CPT were similar for both the groups. During the OTT, the increase in HR was more in RH (P<0.05). The Valsalva ratios for LH and RH were similar. Our findings suggest that the autonomic control over the cardio-vascular system may be different in LH and RH, and that this imbalance could be attributable to a variation in cerebral dominance.
Texto completo:
Disponible
Índice:
IMSEAR (Asia Sudoriental)
Asunto principal:
Postura
/
Presión
/
Respiración
/
Sistema Nervioso Autónomo
/
Estrés Psicológico
/
Presión Sanguínea
/
Dimensión del Dolor
/
Femenino
/
Humanos
/
Masculino
Tipo de estudio:
Ensayo Clínico Controlado
Idioma:
Inglés
Revista:
Indian J Physiol Pharmacol
Año:
2004
Tipo del documento:
Artículo
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