5 Written questions
5 Matching questions
- Brachial Plexus: ULNAR NERVE
- Protective Nerve Coverings: ENDONEURIUM
- Internal Anatomy of Spinal Cord: LATERAL GRAY HORNS
- The Major Plexuses: SACRAL PLEXUS
- The Major Plexses: COCCYGEAL PLEXUS
- a - the roots of spinal nerves (anterior rami) S4-S5 for this small plexus.
- supplies a small area of skin in the coccygeal region.
- b - each nerve fiber sits in this loose connective tissue.
- consists of of a mesh of collagen fibers, fibroblast's, and macrophages surrounded by endoneurial fluid (extracellular fluid) derived from the capillaries.
- this fluid nourishes the neuron and provides the necessary environment for its function of propagating action potentials.
- c - 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.
- d - this nerves supplies the anteromedial muscles of the forearm and most of the muscles of the hand.
- e - 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
5 Multiple choice questions
- - motor neuron axons which transmit nerve impulses from the spinal cord to the periphery.
- the cell bodies of the motor neurons are located in the gray matter of spinal cord.
-cell bodies of motor neurons supplying skeletal muscles are located in anterior gray horns.
-cell bodies of motor neurons supplying smooth muscle, cardiac muscle, or glands are located in the lateral gray horns.
- - arises from the conus medullaris.
- is an extension of the pia mater that extends inferiorly and blends with the arachnoid mater and dura mater to anchor spinal cord to coccyx.
- - spinal nerves rise from the spinal cord as a series of these.
-there are 2 types:
1.)Anterior (ventral) Rootlets
2.) Posterior (dorsal) Rootlets
- - integration takes place in the spinal cord gray matter for this reflex.
- example of this type of reflex is the patellar reflex(knee jerk).
- - this is a somatic branch that runs in the musculoskeletal wall of the body
- this branch serves the deep muscles and skin of the posterior surface of the trunk.
5 True/False questions
External Anatomy of Spinal Cord: SPINAL CORD → - these are the roots of spinal nerves emerging from the lower part of the spinal cord.
- may resemble fine hairs such as "horse's tail"
Sensory&Motor Tracts: POSTERIOR COLUMNS → - motor output to skeletal muscles travels down the spinal cord in two types of descending pathways:
Reflexes & Reflex Arcs: CRANIAL REFLEX → - integration takes place in the brain stem for this type of reflex.
- example is the tracking movements of eyes as you read this sentence.
Internal Anatomy of Spinal Cord: POSTERIOR(dorsal) GRAY HORNS → - contain cell bodies and axons of interneurons as well as axons of incoming sensory neurons.
Brachial Plexus: MEDIAN NERVE → - this nerve supplies most of the muscles of the anterior forearm.