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The Nervous System
The Spinal Cord and Spinal Nerves
37
Anatomy
Undergraduate 1
10/27/2010

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Cards

Term
Describe the Dorsal Root Ganglion?
Definition
It contains the cell bodies of the afferent spinal nerves.
Term
Where is the dorsal root ganglion located?
Definition
Along the vertebral column of the spine.
Term
Is in the spinal cord and is a spider web of collagen fibers.
Definition
Arachnoid
Term
Goes from the Forman Magnum to S2.
Definition
Dura Mater
Term
Are extensions of the Pia Mater
Definition
Denliculate Ligaments
Term
Is continuous with the 4th ventricle of the brain
Definition
The central Canal
Term
What three things make up Grey Matter?
Definition
1. Posterior Grey Horns-Contain somatic and visceral sensory nuclei.
2. Anterior Grey Horns- Contain somatic Motor Nuclei
3. Lateral Grey Horns- Contain visceral motor nuclei.
Term
What covers Grey Matter?
Definition
White Matter
Term
Carry sensory info?
Definition
Ascending Tracts
Term
Carries motor info?
Definition
Descending Tracts
Term
How many pairs of spinal nerves are there?
Definition
31 pairs
Term
Supply the skin and muscles of the back?
Definition
Dorsal Rami
Term
What do the spinal nerves branch into?
Definition
The dorsal and ventral Rami
Term
Supply the skin and muscles of the back?
Definition
Dorsal Rami
Term
What do the spinal nerves branch into?
Definition
The dorsal and ventral Rami
Term
A lot of nerves together is a?
Definition
Plexus
Term
T or F There is a plexus in the thoracic region?
Definition
False
Term
Consists of cutaneous and muscular branches in the ventral rami (C1 to C4 and some of C5)
Definition
Cervical Plexus
Term
Is located deep in the neck in the sternoclediomastoid.
Definition
Cervical Plexus
Term
Damage to what area causes respiratory arrest?
Definition
The chord above C3
Term
Name the major nerve of the cervical plexus?
Definition
The Phrenic Nerve provides the entire nerve supply to the diagram.
Term
Found in the ventral Rami from C5 to T1. Supports the upper limbs
Definition
The Brachial Plexus
Term
What do the superior, middle, and inferior trunks form in the Brachial Plexus?
Definition
They divide into the Anterior and Posterior divisions which hold the Lateral, Posterior, and Medial Chord.
Term
The axillary is found where?
Definition
In the deltoid
Term
The Musculocutaneous is where?
Definition
The elbow Flexors
Term
Supplies the abdominal wall, external Gentiles, and anterior/medial thigh
Definition
Lumbar Plexus
Term
Arises from the ventral divisions of the second, third, and fourth lumbar nerves.
Definition
Obturator Nerve
Term
Arises from the dorsal divisions of the 2nd, 3d, and 4th lumbar nerves.
Definition
Femoral Nerve
Term
Is the most inferior of the plexuses?
Definition
Sacral Plexus
Term
Name the two major nerves of the sacral plexus?
Definition
Sciatic Nerve and Pudendal Nerve
Term
Supplies buttocks, perineum, and part of the lower limb?
Definition
Sacral Plexus
Term
Is derived from the spinal nerves L4 through L3. Begins in the lower back and runs down the buttock.
Definition
Sciatic Nerve
Term
What forms the sciatic Nerve?
Definition
Te common Fibular Nerve and Tibular Nerve behind the knee.
Term
Is the area of skin supplied by one spinal nerve?
Definition
Dermatome
Term
What do Spinal reflexes do?
Definition
They are an automatic response to a change in the environment. Example- Reaction to a hot stove.
Term
What is the most common meylination problem?
Definition
MS
Term
How do you know from an MRI that a person has MS?
Definition
The grey matter will be a lot larger with white platlets
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