Mindblown: a blog about philosophy.
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True autonomic reflex
A visceral response in which afferent impulses do not pass through the central nervous system, but instead enter prevertebral ganglia where connections are made with efferent neurons.
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Triceps reflex
Sharp extension of the forearm resulting from tapping of the triceps tendon while the arm is held loosely in a bent position. The stretching out of the forearm following a quick tap on the triceps tendon located behind the elbow joint.
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Tonic vibration reflex
A polysynaptic reflex believed to depend on spinal and supraspinal pathways.
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Tendon reflex
A deep reflex obtained by sharply tapping the skin over the tendon of a muscle. It is exaggerated in upper neuron disease and diminished or lost in lower neuron disease. Let us explore a fascinating physiological phenomenon known as a reflex action, exemplified by the knee jerk reflex. In this reflex, a gentle impact to…
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Symmetrical tonic neck reflex
In an infant, flexion or extension of the arms in response to flexion and extension, respectively, of the neck.
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Swallowing reflex
Involuntary muscular activity in the oropharynx and nasopharynx when foods, tongue depressors, or other objects stimulate the back of the throat. In humans swallowing is mediated by the deglutition center of the medulla oblongata (i.e., by cranial nerves VII, IX, X, and XI).
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Suprapubic reflex
Deflection of the linea alba toward the stroked side when the abdomen is stroked above Poupart’s ligament.
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Superficial reflex
A cutaneous reflex caused by irritation of the skin or of areas that depend on the spinal cord as a motor center (e.g., the scapular, epigastric, abdominal, cremasteric, gluteal, and plantar reflexes) or on centers in the medulla (e.g., the conjunctival, pupillary, and palatal reflexes). This reflex is induced by a very light stimulus, such…
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Sucking reflex
A sucking movement of an infant’s mouth produced by stroking the lips. A primitive form of this reflex is present in the fetus by the 16th week of gestation; it is fully developed by the time of birth. In adults, the presence of a sucking reflex is an indicator of severe dementia, frontal lobe disease,…
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Stepping reflex
Movements of progression elicited by holding an infant upright, inclined forward, and touching the soles of the feet to a flat surface. This reflex lasts from birth to age 6 weeks.
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