What is GREY commissure?
“Electrical stimulation of the sacral dorsal gray commissure evokes relaxation of the external urethral sphincter in the cat”.
What does the GREY commissure contain?
The term gray commissure refers to the bridge of gray matter that contains the central canal of the spinal cord and connects the gray columns on either side of the spinal cord ( Carpenter-1983 ).
What is the posterior gray commissure?
dorsal gray commissure. Acronym: The term dorsal gray commissure refers to the part of the gray commissure in the spinal central gray posterior to the central canal of the spinal cord. It is identified by Nissl stain and found in the human ( Crosby-1962 ) and the rat ( Swanson-2004 ).
Where is the anterior gray commissure located?
the spinal cord
a bundle of nerve fibers that surrounds the central canal of the spinal cord and connects the anterior and dorsal horns of gray matter in each half of the cord.
What are gray matter horns?
The gray matter forms three pairs of horns throughout most of the spinal cord: (1) the dorsal horns, composed of sensory neurons, (2) the lateral horns, well defined in thoracic segments and composed of visceral neurons, and (3) the ventral horns, composed of motor neurons.
What is the function of the lateral gray horn?
The lateral horn of the spinal cord is the small lateral projection of grey matter located between the dorsal horn and ventral horn and contain the neuronal cell bodies of the sympathetic nervous system.
Is the corpus callosum gray or white matter?
The corpus callosum is the largest white matter structure in the brain, consisting of 200–250 million contralateral axonal projections and the major commissural pathway connecting the hemispheres of the human brain.
What do the posterior gray horns contain?
one of the divisions of the grey matter of the spinal cord, the posterior horn contains interneurons that make connections within the spinal cord as well as neurons that enter ascending sensory pathways. It contains the substantia gelatinosa.
Is the anterior commissure gray or white?
The anterior commissure corresponds to a white matter tract almost completely surrounded by gray matter that crosses the midline just ventral to the supraoptic recess of the third ventricle and the columns of the fornix.
Is the corpus callosum white or GREY matter?
Is grey matter myelinated?
This increased surface area is crucial for effective functioning as more neurons can be present in contrast to a brain with a flat surface. Besides this group of neuronal cells, the axons of grey matter are not heavily myelinated, unlike white matter, which contains a high concentration of myelin.