5 Written questions
5 Matching questions
- Spinal Nerve Branches: MENINGEAL BRANCH
- Protective Coverings of the Spine
- External Anatomy of Spinal Cord: TWO ENLARGEMENTS
- External Anatomy of Spinal Cord: SPINAL CORD
- Spinal Nerve Branches: RAMI COMMUNICANTES
- a - from an exterior view of the spinal cord, two enlargements can be seen:
1.) Cervical Enlargement - is the superior enlargement that extends from C4-T1. Nerves to and from the upper limbs arise from this enlargement.
2.) Lumbar Enlargement - is the inferior enlargement, extends from T9-T12. Nerves to and from the lower limbs arise from here.
- b - these are components of the autonomic nervous system(ANS)
- c - roughly cylindrical, is flattened slightly anteriorly and posteriorly.
- extends from the medulla oblongata to the sue the superior border of the 2nd lumbar vertebrae.
-also known as a mass nerve tissue located in the vertebral canal from which 31 pairs of spinal nerves originate.
- d - the first line of defense are the skull and vertebral column. vertebral column surrounds spinal cord providing as strong protective cases.
- second line of defense is the Meninges, which are 3 protective membranes that lie b/w the bony encasement and nervous tissue.
- Finally, central nervous tissue "floats" in Cerebrospinal Fluid, which cushions both the brain and spinal cord.
- e - this branch reenters the vertebral cavity/canal through the invertebral foramen and supplies the vertebrae, vertebral ligaments, blood vessels of the spinal cordand meninges.
5 Multiple choice questions
- - this nerve supplies the muscles on the posterior aspect of the arm and forearm.
- - these reflexes involve contraction of skeletal muscles.
- - this nerve supplies the deltoid muscles and teres minor muscles.
- - motor output to skeletal muscles travels down the spinal cord in two types of descending pathways:
- - these are clusters of neuronal cell bodies, as functional groups.
*Sensory Nuclei - receive input from receptors via sensory neurons.
*Motor Nuclei - provide output to effector tissues via motor neurons
5 True/False questions
Meninges: ARACHNOID MATER → - this is the middle meninx(meninges), and is an avascular covering.
- is connective tissue that resembles a spider webs arrangement of collagen fibers and some elastic fibers.
- deep to Dura Mater.
*Subdural Space - is a space b/w dura mater and arachnoid mater, which contains interstitial fluid.
Brachial Plexus: ULNAR NERVE → - this nerve supplies the muscles on the posterior aspect of the arm and forearm.
Internal Anatomy of Spinal Cord: LATERAL GRAY HORNS → - these horns are b/w the anterior and posterior gray horns.
- are present only in the thoracic, upper lumbar, and sacral segments of the spinal cord.
- contain the cell bodies of autonomic motor nuclei that regulate activity of smooth muscle, cardiac muscle, and glands.
The Major Plexuses: CERVICAL PLEXUS → - the roots of (anterior rami) of spinal nerves L4-L5 & S1-S4 form this plexus.
- this plexus supplies the buttocks, perineum, and lower limbs.
- the largest nerve in the body, the Sciatic Nerve, arises from this plexus, also the Pudendal nerve.
*more info on Pg 602-603
Spinal Nerve Branches: RAMUS → - the spinal nerve trunk runs for a short distance before branching into two large branches and a variable series of smaller branches, each large branch is called a??
-this branch follows a specific course to different peripheral regions.
-the 2 larges branches are:
1.) Anterior (ventral) Ramus
2.) Posterior (dorsal) Ramus