5 articles
Anterior horn motor neuron
Anterior horn motor neuron (anterior horn cell, ventral horn motor neuron): a lower motor neuron of the spinal cord's anterior horn, in Rexed lamina IX, with alpha and gamma types, that innervates skeletal muscle via acetylcholine at the neuromuscular junction as the final common pathway; targeted in ALS, SMA, and polio.
Lateral grey column
Lateral grey column (lateral horn, columna grisea lateralis medullae spinalis): small lateral projection of spinal cord grey matter at T1–L2/L3 containing preganglionic sympathetic neurons (intermediolateral cell column), with axons reaching the sympathetic trunk via white rami communicantes.
Renshaw cell
Renshaw cell: spinal inhibitory interneuron (named for Birdsey Renshaw, 1941) in the ventral horn's lamina VII/IX; excited cholinergically by α-motoneuron collaterals, it inhibits motoneurons glycinergically, mediating recurrent inhibition.
Spinal grey matter
Spinal gray matter is the central, butterfly- or H-shaped region of the spinal cord containing neuronal cell bodies, organized into ten Rexed laminae and surrounded by white matter.
Substantia gelatinosa of Rolando
Substantia gelatinosa of Rolando (SGR), or substantia gelatinosa, is the translucent lamina II of the spinal dorsal horn, described by Rolando in 1824, that receives C and Aδ fiber input and modulates nociception via gate control circuitry.