Category: T

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…

A Merkel’s disk, a Meissner’s corpuscle, or a nerve plexus around a hair root.  

Any of the free nerve endings in the dermis that detect heat and cold.  

A radiograph that includes views of the mouth in open, closed, and static positions.  

Groups of fibers connecting the thalamus with the cerebral hemispheres. These include frontal, centroparietal, occipital, and optic radiations.  

The temporary state of absent or diminished sensory and motor function throughout the body caused by trauma to the cervical spine. Symptoms clear within 15 min to 48 hr.  

A rare life-threatening disease marked by widespread aggregation of platelets throughout the body, neurological dysfunction, and renal insufficiency. The disease is triggered by a deficiency of an enzyme that cleaves von Willebrand factor (a blood clotting protein). This deficiency results in blood clots in small blood vessels throughout the body. Shifting neurological signs such as…

A pupil that reacts slowly in accommodation-convergence reflexes.  

The surgical creation of a passage between the trachea and esophagus. It is used for vocal restoration in patients who have undergone laryngectomy. The technique provides air to the esophagus. The patient is trained to use that air to make vibrations that recreate speech. A surgically created connection between the trachea and the esophagus made…

A pulse with three separate expansions during each heartbeat.