Spinal Nerves Flashcards
What is a myotome?
A myotome is, therefore, a set of muscles innervated by a specific, single spinal nerve.
What is a dermatome?
A dermatome is an area of skin in which sensory nerves derive from a single spinal nerve root
What is a cutaneous nerve?
Cutaneous innervation refers to the area of the skin which is supplied by a specific cutaneous nerve.
How many cranial nerves do we have?
12
Which cranial nerves arise from the cerebrum?
Olfactory and optic
Which cranial nerves arise from the brain stem?
C3 to C12
What is a spinal nerve?
A nerve which exits the spinal cord but has not yet contributed towards the formation of a plexus.
What is a peripheral nerve?
The peripheral nervous system is the network of nerves that lie outside the central nervous system
What is a Dorsal root ganglion?
A dorsal root ganglion is a cluster of neurons (a ganglion) in a dorsal root of a spinal nerve.
Does a dorsal root ganglian contain motor or sensory fibres?
Sensory
A dorsal root ganglion (or spinal ganglion; also known as a posterior root ganglion) is a cluster of neurons (a ganglion) in a dorsal root of a spinal nerve.
What is an afferent nerve?
Afferent neurons are sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain.
PNS to CNS
What is an efferent nerve?
efferent neurons are motor neurons that carry neural impulses away from the central nervous systme and towards muscles to cause movement.
CNS TO PNS
Spinal nerves exit the vertebrae via?
Intervertebral foramina
Does a ventral root ganglian contain motor or sensory fibres?
In anatomy and neurology, the ventral root or anterior root is the efferent motor root of a spinal nerve. At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
Where is the sympathetic chain located?
Thoracolumber outflow
T1 to L2
