Search results
Results from the WOW.Com Content Network
Cervical spinal nerve 4, also called C4, is a spinal nerve of the cervical segment. It originates from the spinal cord above the 4th cervical vertebra (C4). It contributes nerve fibers to the phrenic nerve , the motor nerve to the thoracoabdominal diaphragm .
The body is innervated by spinal nerves that branch off from the spinal cord. [18] This innervation enables the brain to receive sensory inputs and send motor outputs. There are 8 cervical spinal nerves of the peripheral nervous system. Cervical spinal nerves C1, C2 and C3 help control the movements of the head and neck.
The thyrohyoid branch [1] (also: thyrohyoid branch of ansa cervicalis, [2] or nerve to thyrohyoid (muscle) [2] [3]: 595, 600 ) is a motor branch derived from the cervical plexus [2] [2] [3]: 595, 600 [4]: 457, 709 formed by fibres of (the anterior ramus of [3]: 600 ) the cervical spinal nerve 1 (C1) [3]: 582 [5] [6] [4]: 457, 709 (and - according to some sources - cervical spinal nerve 2 (C2 ...
There is anastomosis with accessory nerve, hypoglossal nerve and sympathetic trunk. It is located in the neck, deep to the sternocleidomastoid muscle. [5] The branches of the cervical plexus emerge from the posterior triangle at the nerve point, a point which lies midway on the posterior border of the sternocleidomastoid.
They allow for flexion and extension and limit lateral flexion in the cervical spine. Pathological processes that can occur in these joints include degenerative changes or hypertrophic arthritis, resulting in foraminal stenosis and nerve compression. Foraminal stenosis at this joint is the most common cause of cervical nerve root pressure.
When a nerve is stimulated, i.e., when sufficient electrical charge is provided to a nerve cell, a localized depolarization of the cell wall occurs resulting in an action potential that propagates toward both ends of the axon. Typically, one "wave" of action potentials will propagate along the axon towards the muscle (orthodromic propagation ...
It shows stenosis of the left intervertebral foramen between cervical vertebra 3 and 4, indicating radiculopathy of cervical spinal nerve 4. Date: 1 June 2017: Source:
Intraoperative neurophysiological monitoring (IONM) or intraoperative neuromonitoring is the use of electrophysiological methods such as electroencephalography (EEG), electromyography (EMG), and evoked potentials to monitor the functional integrity of certain neural structures (e.g., nerves, spinal cord and parts of the brain) during surgery.