Results 211 to 220 of about 16,165 (267)

Eyelid Reflex Response to Stretch

Nature, 1962
AMONG the evidence of consciousness in the human subject, the position of the upper eyelid fulfils a significant role, and varies with the degree of attention1. It is of interest, therefore, to understand the mechanisms causing eyelid movement and particularly the relationship of local automatic reflexes to-this function.
D W, KENNARD, G L, SMYTH
openaire   +2 more sources

Functional Stretch Reflex (FSR) — a Cortical Reflex?

1976
Publisher Summary This chapter presents an experimental study to discuss the role of reflexes during functional activity. The time from initiation of the task to the resulting electromyographic activity is measured to determine the tendon reflex latency, the functional stretch reflex latency, and the voluntary response time in human lower limbs.
W, Freedman, S, Minassian, R, Herman
openaire   +2 more sources

Studies of the human stretch reflex

Journal of the Neurological Sciences, 1968
Abstract Measurements of the response to stretch in the triceps surae muscle of 12 normal human subjects are described. Three types of response were observed. One response indicated rheologic factors to be virtually the only determinants of tension, another response indicated rheologic factors predominant at slow speeds with reflex activity at high ...
H, Schaumburg, R, Herman
openaire   +2 more sources

Modulation of the functional stretch reflex by the segmental reflex pathway

Experimental Brain Research, 1976
Electromyographic (EMG) reflex responses were examined in the biceps muscle of awake Cebus monkeys trained to resist perturbations of a handle with their forearm. In particular responses at latencies of 15-20 msec (M1) and 40-55 msec (M2), thought to correspond to segmental and suprasegmental reflex pathways respectively, were studied.
T, Vilis, J D, Cooke
openaire   +2 more sources

Sensitivity of H-Reflexes and Stretch Reflexes to Presynaptic Inhibition in Humans

Journal of Neurophysiology, 1998
Morita, H., N. Petersen, L.O.D. Christensen, T. Sinkjær, and J. Nielsen. Sensitivity of H-reflexes and stretch reflexes to presynaptic inhibition in humans. J. Neurophysiol. 80: 610–620, 1998. The sensitivity of soleus H-reflexes, T-reflexes, and short-latency stretch reflexes (M1) to presynaptic inhibition evoked by a weak tap applied to the biceps ...
Morita, H, Petersen, Nicolas, Christensen, LOD, Sinkjær, Thomas, Nielsen, Jens Bo   +4 more
openaire   +3 more sources

Regulatory actions of human stretch reflex

Journal of Neurophysiology, 1976
1. The stretch reflex in the elbow flexor musculature was studied in 23 human subjects. The subjects were required to establish an initial force equivalent to 10% maximum at a prescribed initial length; mechanical disturbances delivered at random times increased load force to 15% or reduced it to 5%.
P E, Crago, J C, Houk, Z, Hasan
openaire   +2 more sources

Regulation of wrist stiffness by the stretch reflex

Journal of Biomechanics, 1989
In restoring the angular position after a displacement, the role of the muscle stretch reflex was investigated by comparing the restored angular torques and angular positions in the wrist under ischaemic and non-ischaemic conditions in normal human subjects.
T, Sinkjaer, R, Hayashi
openaire   +2 more sources

Stretch Reflexes and Parkinsonian Tremor

1987
By coupling human limbs to a machine, which drives a single joint through sinusoidal flexion-extension movements, it is often possible to entrain the resting tremor of Parkinson's disease. Entrainment is most likely to occur when the imposed movement is large in amplitude and close in frequency to the spontaneous tremor.
openaire   +2 more sources

Modulation of the tonic stretch reflex by monoamines

European Journal of Pharmacology, 1979
The effects of L-DOPA and 5-HTP on the tonic stretch reflex (TSR) in the decerebrate rat were studied. L-DOPA facilitated the TSR in a dose-dependent manner. The facilitation of the TSR was blocked by pimozide. A sensitive electromygraphic (EMG) technique capable of recording single motor unit discharges was used.
J W, Commissiong, E M, Sedgwick
openaire   +2 more sources

An Assessment of Stretch Reflex Function

1976
Publisher Summary Most investigators believe that the stretch reflex is an important mechanism in the regulation of posture and movement, but the precise nature of its actions and the importance of this reflex in intact animals and humans have remained unclear.
openaire   +2 more sources