Lab: Spinal cord and Brachial plexus Flashcards
List the spinal cord meninges and it’s spaces.
- Epidural space
- Dura mater
- Subdural space
- Arachnoid mater
- Subarachnoid space (cerebrospinal fluid)
- Pia mater
Identify the anatomy of gray matter and each structure’s characteristics.
Posterior horns: contains axons of sensory neurons and cell bodies of interneurons
Lateral horns: contains cell bodies of autonomic neurons (innervate smooth muscle, cardiac muscle, and glands
Anterior horns: contain cell bodies of somatic motor neurons (innervate skeletal muscles)
Central canal: continuous with ventricles of the brain
Identify the anatomy of white matter.
- Posteriot funiculus
- Lateral funiculus
- Anterior funiculus
From this list of spinal nerves, which ones contain motor or sensory axons?
Anterior rootlets
Anterior root
Posterior rootlets
Posterior root
Posterior root ganglion
- Anterior root: motor axons ONLY
- Posterior root: sensory axon ONLY
- Posterior root ganglion: cell bodies of sensory neurons
The cervical plexus innervates the muscles of the neck and is a part of which rami?
Anterior rami of spinal nerves C1-C4
The phrenic nerve innervates which organ and is a part of which plexus?
- innervates diaphragm
- cervical plexus
The brachial plexus innervates the muscles of the upper limb and is a part of which rami?
Anterior rami of spinal nerves C5-T1
Identify the trunks, divisions, and cords of the brachial plexus.
Trunks:
- superior trunk
- middle trunk
- inferior trunk
Divisions
- Anterior division
- Posterior division
Cords
- Posterior cord (Axillary and Radial nerve)
- Medial cord (Ulnar nerve)
Lateral cord (musculocutaneous nerve)
Generally, nerves from the anterior division of the brachial plexus innervate muscles that _____, while nerves from the posterior division of the brachial plexus innervate muscles that ______.
flex; extend
