Spinal Cord in depth Flashcards
The spinal cord is a long tube of what?
Nervous tissue
The gray matter of the spinal cord contains what?
What does it look like?
Neuron cell bodies
A butterfly
The white matter surrounds the ___ and contains what?
The butterfly
Neuron cell bodies
Axons are surrounded by a white substance called what?
Myelin
The ventral root contains ____neurons
Motor
The dorsal root contains ____ neurons
Sensory
Dorsal root fibers join ventral root fibers to form what?
A spinal nerve
Ventral roots carry ______ from the spinal cord to _____
motor information
to muscle
Dorsal roots carry sensory information from _____ to ______
the body
the spinal cord
Dorsal Primary rami innervate what?
They carry sensory information from ____ to ____
Skin of dorsum of body
Skin of back to spinal cord
Dorsal primary rami also carry _____ neurons to the deep muscles of the back
motor
The medial branch of DPR innervates dorsal skin from ___ to ___
C2- T6
The lateral branch of DPR innervates dorsal skin from ____ to ____
T7- Sacrum
Ventral primary rami receives 90% of ________
cutaneous sensory info
Cervical, lumbar, and sacral ventral primary rami join within their group to form a bundle aka a _____
plexus
Thoracic ventral primary rami stay ____ and have a rounded pathway around the wall of the body cavity.
separate
Just before the forming of the spinal nerve, the dorsal root has a a ganglion?
dorsal root ganglion
The ventral primary rami branches into which two nerves?
lateral cutaneous and anterior cutaneous nerve
Lateral cutaneous goes into the superficial fascia and innervates what body surfaces?
lateral, dorsal and inferior
Anterior cutaneous nerve goes into the superficial fascia and innervates the skin what area?
front midline
Spinal nerves and DRG are at level of what?
intervertebral foramen
The cervical plexus includes nerves from which vertebrae?
C1-C4
The brachial plexus has nerves from which vertebrae?
C5-T1
There is only __ pair of coccygeal nerves
1
