منابع مشابه
A cardiocardiac sympathovagal reflex in the cat.
The reflex changes in single cardiac vagal efferent fibers elicited by excitation of afferent cardiac sympathetic fibers were studied in cats anesthetized with chloralose and urethane. Efferent vagal and sympathetic units were dissected from the end of a cardiac nerve cut at its junction with the right atrium. In some cases, efferent vagal units were dissected from the cervical vagus. Excitatio...
متن کاملPlasticity in reflex pathways controlling stepping in the cat.
Previous studies have shown that stimulation of group 'I' afferents from ankle extensor muscles can prolong the cycle period in decerebrate walking cats and that the magnitude of these effects can be altered after chronic axotomy of the lateral-gastrocnemius/soleus (LGS) nerve. The effectiveness of LGS group I afferents in prolonging the cycle period decreases after axotomy, whereas the effecti...
متن کاملThe labyrinthine posture reflex (righting reflex) in the cat during weightlessness.
LTHOUGH it is generally accepted that linear acceleration is the physical stimulus for the otolith organ, its function during periods of increased and decreased gravity has not been ~ l a r i f i e d . ~ , ~ J ~ In 1952, SlaterlG discussed the probable response of the otoliths to the weightless condition by drawing some tentative conclusion from morphologic data and electrophysiologic experimen...
متن کاملVentrolateral medullary respiratory network participation in the expiration reflex in the cat.
The expiration reflex is a distinct airway defensive response characterized by a brief, intense expiratory effort and coordinated adduction and abduction of the laryngeal folds. This study addressed the hypothesis that the ventrolateral medullary respiratory network participates in the reflex. Extracellular neuron activity was recorded with microelectrode arrays in decerebrated, neuromuscular-b...
متن کاملStudies on the Nerve Pathways Involved in the Laryngeal Reflex (laryngospasm) En the Cat
The receptor sites and nerve pathways involved in the reflex production of laryngospasm have been investigated in the cat. The trigeminal nerves and the internal branch of the superior laryngeal nerves were shown to provide an afferent pathway for the reflex when the nasopharynx and larynx were exposed to ether vapour. Evidence was obtained suggesting that the recurrent laryngeal nerves may for...
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ژورنال
عنوان ژورنال: Nature
سال: 1953
ISSN: 0028-0836,1476-4687
DOI: 10.1038/172688a0