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axons of sensory neurons
Ebba Hoeger
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What is the function of the ventral root of a spinal nerve?
Motor function, as opposed to the dorsal roots, which are primarily sensory.
Where are large groups of neuron cell bodies found?
In the dorsal root ganglia. The dorsal root ganglia is located in the dorsal root. The cells carry sensory signals to the spinal cord.
What does the dorsal root ganglion contain?
Autonomic ganglia contain the cell bodies of motor neurons.
What root of a spinal nerve consists of motor neuron axons?
Ventralventral root
What is loss If the anterior root of a spinal nerve is severed?
The anterior or ventral roots carry motor or efferent information from motoneurons in the anterior horn to muscles. This is as opposed to the dorsal roots that convey sensory or afferent informaiton from the periphery to the dorsal horns of the spinal cord. This is not to be confused with ventral rami that subserve intrinsic muscles of the back and neck. Therefore if a ventral root is severed or cut there would be a loss on motor function to muscles in the distribution of that root (called a myotome).
Where are the spinal ganglion situated?
They are situated on the dorsal root of each spinal nerve. (:
Where do sensory nerve fibers enter the spinal cord?
The dorsal column or medial lemniscus.
Damage to this fiber type would lead to a loss of sensory function?
ventral root of a spinal nerve
What If the dorsal root of a spinal nerve is severed?
Sensory input would be blocked.
The anterior root and the posterior root fuse to form?
Each spinal nerve attaches to spinal cord by a ventral (anterior) root and a dorsal (posterior) root.All spinal nerves are mixed nerves (both motor and sensory).
Is ventral root a loss of motor function?
Yes, the ventral root of a spinal nerve is the efferent motor root, consists of axons of motor neurons. It joins the dorsal root to form a mixed spinal nerve, which consists of afferent sensory neurons (from the dorsal root) and efferent motor neurons (from the ventral root). Therefore severing the ventral root will result in a loss of motor function for the myotome supplied by that spinal nerve.
Would there be a loss of sensory or motor function when someone damages the dorsal root of a spinal nerve?
Yes this can happen when any nerve is damaged but this is a greater danger if its an actual Spinal Nerve.
What order neuron conduct sensory impulses from the brain stem and spinal cord to the thalamus?
from spinal nerve to posterior (dorsal) root
What is the function of the ventral root of a spinal nerve?
Motor function, as opposed to the dorsal roots, which are primarily sensory.
What is the medical term meaning surgical resection of the dorsal root of a spinal nerve to relieve pain?
Radiculotomy
What part of a spinal nerve contains only efferent fibers?
The ventral root of the spinal nerve has the efferent fibers and the dorsal root has the afferent. Prior to joining each other in the spine they each consist of only those fibers.
What are the 31 pairs of spinal nerve?
The 31 pairs of spinal nerves are: 8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal. They are formed by the ventral and dorsal root of the nerve that comes out of the spinal cord.
