Anatomy: Thorax and Back Nervous System (10)

5, 6, 7

5, 6, 7

Identify which numbers are the posterior horn, lateral horn, and anterior horn

1, 2, 3

ID posterior column, lateral column, anterior column

Dura mater, arachnoid, pia mater

What are the 3 membranes that surround all of CNS (superficial to deep)

pia mater - Red, arachnoid - light purple, dura mater - green

ID pia mater, arachnoid mater, and dura mater

L3

Where in the vertebrae is the cauda equina?

Cranial (12 pairs)
Spinal (31 pairs)

The PNS contains what 2 large groups of nerves?

anterior; posterior

The spinal nerve is _____________(anterior/posterior) to the spinous process and ___________(anterior/posterior) to the vertebral body

Laterally

what direction do the spinal nerves come out from the spinal cord?

anterior gray matter (anterior/ventral horn)

Where do motor fibers exit from?

posterior/dorsal horn

Where do sensory fibers enter?

7 cervical vertebrae, 8 nerves

How many cervical vertebrae and nerves are there?

superiorly, inferiorly

All cervical nerves exit ____________ to the corresponding vertebra except C8 which exits _____________

First 5 cervical nerves (c1-C5)

The cervival plexus is formed by which nerves?

Originates from C3-C5 - runs through pericardium of heart and innervates diaphragm.

where does the R and left phrenic N originate from? what major organ does it run through and what other organ does it innervate?

Parts of head, neck, and shoulders

Where does the cervical plexus innervate?

respiratory arrest

Damage to spinal cord above C3 causes....

inferiorly

T1-T12 nerves exit _________(inferiorly/superiorly) to the corresponding vertebrae

C5-C8 & T1

Where nerves does the brachial plexus originate from?

deltoid m. and teres muscle

What does the axillary n of the brachial plexus innervate?

elbow flexors

What does the musculocutaneous n of the brachial plexus innervate?

shoulder, elbow, wrist and finger extensors

What does the radial n of the brachial plexus innervate?

flexors of wrist and hand

What does the medial and ulnar n of the brachial plexus innervate?

Buttock to foot

Sciatica pain extends from where to where?

Receptor
Dorsal root ganglion
dorsal root
dorsal horn

What is the neuro pathway for a sensory neuron?

ventral horn/motor neuron
ventral root
muscle

What is the neuro pathway for a motor neuron?

Somatic - voluntary
ANS - involuntary

Somatic and Autonomic nervous systems do what?

Receptor
sensory neuron (afferent)
integrating center
motor neuron (efferent)
effector

What is the nervous pathway for a reflex reaction? (ie. touching hot stove)

Fight or flight - can shunt or increase blood flow, and dilate/constrict lungs depending on need. Dilates pupils. Increased adrenaline, etc.

What is the fx of sympathetic nervous system?

Rest and digest - diate blood vessels to GI tract, stimulates salivary glands, accelerates preistalsis. pupil constriction.

What is the fx of parasympathetic nervous system?

1) Dura mater - "tough mother", strong
2) Arachnoid mater - spidery looking, carries blood vessels
3) Pia mater - "delicate mother", adheres tightly to surface of spinal cord

characteristics of pia mater, arachnoid mater, and dura mater