ventral horn การใช้

• These axons also synapse with lower motor neurons in the ventral horns.
• Originates from ventral horn at lumbosacral spinal levels.
• Also, Onuf s nucleus is found almost symmetrically on both sides of the ventral horn.
• In essence the Renshaw cells regulate the firing of the alpha motor neuron leaving the ventral horn.
• These axons synapse with lower motor neurons in the ventral horns of all levels of the spinal cord.
• In the spinal cord, ?-MNs are located within the gray matter that forms the ventral horn.
• Motor pools that control flexor muscles are located dorsally to the ventral horn while those that control extensor muscles are located ventrally.
• For example, poliomyelitis is caused by a virus that specifically targets and kills motor neurons in the ventral horn of the spinal cord.
• In the developing spinal cord, Nkx-2.2 regulates IRX3 thereby contributing to the proper differentiation of the ventral horn neurons.
• These lower motor neurons, unlike those of the DL, are located in the ventral horn all the way throughout the spinal cord.
• Motor pools that control proximal muscles are generally located medial to the ventral horn, while those that control distal muscles are located laterally.
• This innervation, or nerve supply, is arranged in a neuropil and averages approximately 300-500 in both the left and right ventral horns in animals.
• Finally the somatic nerve supply arises from the urethral sphincter motor neurons in the ventral horn of the sacral spinal cord; better known as Onuf s nucleus.
• These neurons send long axons to the contralateral motor nuclei of the cranial nerves and to the lower motor neurons in the ventral horn of the spinal cord.
• :The medial vestibulospinal tract projects bilaterally from the medial vestibular nucleus within the medial longitudinal fasciculus to the ventral horns in the upper cervical cord ( C6 vertebra ).
• As mentioned before, the motoneurons of the external urethral sphincter and the external anal sphincter are found in ventral horn of the second sacral segment known as Onuf s nucleus.
• Lamina IX is located predominantly in the medial aspect of the ventral horn, although there is some contribution to lamina IX from a collection of motor neurons located more laterally.
• Females typically produce thick-shelled eggs with a sub-polar dorsal horn of the uterus, and the thin-shelled ones will come out from the ventral horn.
• Poliomyelitis, caused by the poliovirus seen here, is associated with the selective loss of cells within the ventral horn of the spinal cord, where ?-MNs are located.
• CGRP is derived mainly from the cell bodies of motor neurons when synthesized in the ventral horn of the spinal cord and may contribute to the regeneration of nervous tissue after injury.