Reflex Cycle
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Duração do ato e do ciclo mastigatorio em individuos com disfunção craniomandibular
The purpose of this study was to assess the eletromyographic parameters of the masticatory act duration, in the muscles temporal anterior and masseter of the 46 subjects with craniomandibular disorders (CMD), corresponding to the period of time between the start and the final of muscle contration; the duration of the masticatory cycle, or the period between
Publicado em: 1996
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14. Investigação de sensores para uso no controle de locomoção de tetra/paraplegicos com estimulação eletrica neuromuscular
The rehabilitation of spinal cord injuried (SCl) subjects is based on Hybrid Systems (mechanical orthoses and Neuromuscular Electrical Stimulation - NMES)with Sensors for Automatic Gait Control (SCAG) external footswitches, patellar transducer. During the gait cycle the SCAGs detects the swing and the stance phases while a Central of Automatic Control(CAC)al
Publicado em: 1993
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15. Interaction between short- and long-latency components of the human stretch reflex during sinusoidal stretching.
1. Using wrist muscles, the subdivision of the human stretch reflex into separate components was examined with small amplitude sinusoidal stretching of relatively high frequency (10-40 Hz). The reflex was evoked by angular rotation of the wrist (below 1 deg amplitude), applied via the hand during maintained voluntary contraction of the muscle studied; both f
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16. Pupil cycle time: a simple way of measuring an autonomic reflex.
Persistent regular oscillations of the pupil of the eye can be induced using a slit-lamp. The period of these oscillations, pupil cycle time (PCT), is simple to measure with a hand-held stop-watch. Evidence from pharmacological testing suggests that PCT is a sensitive measure of dysfunction of the parasympathetic efferent limb of the pupillary light reflex a
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17. Gain of the triceps surae stretch reflex in decerebrate and spinal cats during postural and locomotor activities.
1. The triceps surae (TS) stretch reflex was measured in decerebrate cats during crossed extensor stimulation and after spinalization during rhythmic locomotor activity induced by clonidine and manual perineal stimulation. The TS force in response to sinusoidal stretch was measured at a given contraction level before and after deafferentation, and the 'refle
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18. Conditioning of H reflex by a preceding subthreshold tendon reflex stimulus.
The soleus H reflex excitability cycle has been studied using, as conditioning stimulus, a mechanical tap, subthreshold for the tendon reflex, which was applied either on the Achilles tendon, the short biceps tendon, or the quadriceps tendon. In all cases there was an early facilitation followed by a longlasting inhibition of the test H reflex. The same resu
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19. Modulation of the soleus H-reflex during pedalling in normal humans and in patients with spinal spasticity.
Soleus H-reflexes were recorded in 10 normal subjects and seven patients with spasticity caused by incomplete spinal cord injury while they pedalled on a stationary bicycle which had been modified to trigger electrical stimuli to the tibial nerve at eight precise points in the pedal cycle. Stimulus strength was adjusted to yield M-waves of constant amplitude
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20. Mechanism for reflex reversal during walking in human tibialis anterior muscle revealed by single motor unit recording.
1. A reversal in the sign of a cutaneous reflex during walking was recently described in the human. Such reversals were most clearly seen in muscles that were active in two parts of the step cycle, such as the tibialis anterior (TA). The current study determined whether the reversal resulted from differential activation of a single group of motor units. 2. S
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21. Inspiratory inhibition of vagal responses to baroreceptor and chemoreceptor stimuli in the dog.
1. Single and few-fibre cardiac efferent filaments were dissected from the cervical vagus nerve of dogs anaesthetized with chloralose and paralysed with pancuronium. 2. Brief selective baroreceptor or chemoreceptor stimuli, given during the expiratory phase of the central respiratory cycle and while the lungs were motionless, evoked trains of action potentia
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22. Discharge pattern of single motor units in the tonic vibration reflex of human triceps surae.
Using a single fibre EMG electrode the firing pattern of 46 motor units in the triceps surae has been studied during vibration of the Achilles tendon at frequencies of 25--200 Hz. Potentials activated in the tonic vibration reflex (TVR) were phase-locked to the vibration cycle but tended to become somewhat less so with continued vibration. The firing pattern
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23. Abnormalities of the blink reflex in Gilles de la Tourette syndrome.
The blink reflex and it's recovery cycle were studied in 26 patients with Gilles de la Tourette syndrome and 10 controls. There was a significant increase in the mean duration of the R2 response. The amplitude of the R2 response following paired shocks (mean R2[T]/R2[C]%) was 11%, 40% and 52% of the conditioning stimulus with intervals of 200 ms, 500 ms and
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24. Electromyographic responses to imposed sinusoidal movement of the human thumb.
1. The interphalangeal joint of the thumb was driven through sinusoidal flexion-extension movements while electromyograms were recorded from over the flexor pollicis longus muscle. 2. When the subject relaxed his thumb the movement generated no detectable e.m.g. response. When, however, he exerted a voluntary flexing force electrical activity could be record