Search results
30 paź 2023 · There are 31 bilateral pairs of spinal nerves, named from the vertebra they correspond to. For the most part, the spinal nerves exit the vertebral canal through the intervertebral foramen below their corresponding vertebra.
- Grey Matter
Like the rest of the central nervous system, the spinal cord...
- Coccygeal Nerve
Branches and innervation. The coccygeal nerve terminates in...
- Stretch Reflex
The stretch reflex is the contraction of a muscle that...
- Ganglia
A ganglion (pl. ganglia) is a mass of nerve cell bodies...
- Withdrawal Reflex
a noxious stimulus, such as heat or pain, will excite the...
- Myotomes
Myotome: A group of muscles innervated by a single spinal...
- Grey Matter
8 kwi 2023 · The relevant anatomy of the innervation of the musculature of the back by the spinal nerves is centered around the lumbar spinal nerves, peripheral nerves of the lumbar plexus, spinal cord, and lumbar vertebral column. In general, the spinal cord consists of gray and white matter.
Each spinal nerve is a mixed nerve, formed from the combination of nerve root fibers from its dorsal and ventral roots. The dorsal root is the afferent sensory root and carries sensory information to the brain. The ventral root is the efferent motor root and carries motor information from the brain.
14 sie 2023 · Each nerve forms from nerve fibers, known as fila radicularia, extending from the posterior (dorsal) and anterior (ventral) roots of the spinal cord. The roots connect via interneurons. Grossly, the root fibers join together within the intervertebral foramina to form a spinal nerve.
Learn about the formation, structure, and function of spinal nerves, which are bundles of nerve fibers connected to the spinal cord. Find out how spinal nerves supply the body with motor, sensory, and autonomic signals, and how they can be affected by various conditions.
21 paź 2024 · Spinal nerves are all mixed nerves with both sensory and motor fibers. Spinal nerves emerge from the spinal cord and reorganize through plexuses, which then give rise to systemic nerves. Thoracic spinal nerves are not part of any plexus, but give rise to the intercostal nerves directly.
17 gru 2019 · The spinal nerves, mixed and paired nerves, 31 in number, emerge from the spinal cord and innervate the whole body, except the face. Each nerve contains somatic and vegetative afferent sensory and autonomic afferent fibers by the communicating branches and the...
