منابع مشابه
The Absence of Vasoconstrictor Reflexes in the Fore- Head Circulation. Effects of Cold1
Plethysmographic data were presented in earlier publications (1, 2, 3) to illustrate the selective character of vasomotor activity in the skin. These plethysmograms indicated the absence of vasoconstrictor reflexes in head skin (with the exception of the ear). It has been suggested that these results “may be due rather to relative vasomotor inactivity of certain vessels than to an independence ...
متن کاملA comparison of flexor and extensor reflexes of muscular origin.
Whereas extensor muscles of decerebrate mammalian preparations usually present both phasic and tonic reflex contraction to stretch (Liddell & Sherrington, 1925), flexor muscles present phasic stretch reflexes only (Asayama, 1916). Under anaesthesia or during spinal shock (Creed, Denny-Brown, Eccles, Liddell & Sherrington, 1932, p. 51), tonic stretch reflexes are lost while phasic responses are ...
متن کاملStretch reflexes in the upper limb of spastic man.
The reflex response to stretch has been studied in the upper limb of 20 spastic patients. The amplitude of reflex EMG was found to be closely related to the velocity of stretch. Reflex EMG in biceps and triceps muscles was augmented by increasing the length of the muscle, although minimal inhibition of reflex EMG in biceps was obtained in two patients by extreme stretch. The clasp-knife sensati...
متن کاملFlexion-Withdrawal Reflexes in the Upper-Limb Adapt to the Position of the Limb
INTRODUCTION Noxious electrical stimulation of the fingers produces a coordinated reflex response in upper limb muscles that results in the withdrawal of the limb, analogous to removing the hand from touching a hot stove [1, 2]. In general, the upper limb withdrawal is accomplished by a proximaldistal progression of shoulder extension, elbow flexion, and wrist extension [1]. However, exceptions...
متن کاملLocal postural vasomotor reflexes arising from the limb veins.
Blood flow of the toes and fingers was studied plethysmographically with the level of the blood vessels below or above the heart, using the contralateral digit as control. The apparent flow is a maximum when the vessels are near the heart level. The decrease of flow when the vessels are raised is explained on the basis of narrowing and closure of vessels when the hydrostatic pressure within the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1928
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1928.sp002477