MOTOR IMPAIRMENT The degree of motor dysfunction depends on the extent of the spinal cord lesion. Complete lesions destroy all function below the affected level. Incomplete lesions cause partial weakness,…
As shown in the illustration, rubrospinal fibers decussate almost immediately on leaving the red nucleus to descend through the lateral part of the brainstem to the spinal cord. In the…
OLFACTORY PATHWAY Olfactory Bulb. About 100 million olfactory afferent fibers enter the olfactory bulb, a flattened, oval mass lying near the lateral margin of the cribriform plate of the ethmoid…
The posterior funiculus, made up of the fasciculus gracilis and the fasciculus cuneatus, carries fibers that signal discriminative touch or pressure, muscle length and tension, and joint position. Some afferent…
Trigeminal ganglionopathy in association with connective tissue disease is likely caused by circulating autoantibodies to ganglion cell bodies. This is particularly seen in scleroderma or Sjögren syndrome. Numbness begins around…
Related posts: Arteries of Spinal Cord Spinal Reflex Pathways Cervical Spondylosis Distribution of Motor and Sensory Fibers Cell Types of Nervous System Autonomic Nerves in Neck
Related posts: Arteries of Spinal Cord Spinal Reflex Pathways Cervical Spondylosis Distribution of Motor and Sensory Fibers Cell Types of Nervous System Autonomic Nerves in Neck
The pharyngeal reflex or gag reflex is elicited by stimulating the posterior pharyngeal wall and results in bilateral contraction of the pharyngeal muscles and brief elevation of the soft palate….
Muscle Stretch Reflex. Parts A and B show some of the connections made by groups Ia and II (not shown) afferent fibers from muscle spindle receptors. These afferent fibers are…
The fibers of the ventral cochlear nucleus then project to the superior olive located in the medulla. The fibers then project by way of the lateral lemniscus nuclei and other…
