5 Written Questions
5 Matching Questions
- Internal Anatomy of Spinal Cord: ANTERIOR MEDIAN FISSURE
- Sensory&Motor Tracts: POSTERIOR COLUMNS
- Protective Nerve Coverings: ENDONEURIUM
- Spinal Nerve Branches: RAMUS
- Meninges: DURA MATER
- a - this is the most superficial of the 3 spinal meninges, and is composed of dense irregular connective tissue.
- forms a sac from the level of the foramen magnum to the 2nd sacral vertebral.
*Epidural Space - is a space b/w the dura mater and wall of the vertebral canal, filled w/ a cushion of fat and connective tissue that protects the spinal cord.
- 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 - include the Gracile Fasciculus and Cuneate Fasciculus, which carry nerve impulses for several kinds of of sensations that includes:
1.) Proprioception - awareness of positions/movements of muscles, tendons, and joints
2.) Discriminative Touch
3.) Two-Point Discrimination - ability to distinguish touching of two diff points on the skin
4.) Light Pressure Sensations -
5.) Vibration Sensations
- d - two grooves penetrate the white matter of spinal cord and divide it into right and left sides.
- this is a wide groove on the anterior(ventral) side.
- e - 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
5 Multiple Choice Questions
- - this matter consists of bundles of myelinated axons of sensory neurons, interneurons, and motor neurons.
- also organized into regions called columns:'
1.) Anterior(ventral) white columns
2.) Posterior (dorsal) White columns
3.) Lateral White Columns
-each column contains distinct bundles of axons having a common origin or destination, carrying similar info.
- - this is known to be a fast, involuntary, unplanned sequence of actions that occurs in response to a particular stimulus.
- - this nerve supplies the anterior muscles of the arm.
- - each spinal nerve is attached to a spinal segment by two roots:
- are sensory nerve fibers that transmit nerve impulses from the periphery into the spinal cord.
*Posterior Dorsal Root Ganglion - contains the cell bodies of the sensory neurons.
- -these are three connective tissue coverings that encircle the spinal cord and brain.
-from superficial to deep they are:
1.) Dura Mater
2.) Arachnoid Mater
3.) Pia Mater
5 True/False Questions
Brachial Plexus: ULNAR NERVE → - this nerve supplies the deltoid muscles and teres minor muscles.
The Major Plexuses: BRACHIAL PLEXUS → - the roots of spinal nerves C5-C8 and T1 form this plexus.
- this plexus provides almost the entire nerve supply of the shoulders and upper limbs.
- Five important nerves arise from this plexus:
1.) Axillary Nerve
2.) Musculocutaneous Nerve
3.) Radial Nerve
4.) Median Nerve
5.) Ulnar Nerve
*study more info on Pg 597-599
Intercostal Nerves → - these nerves are part of the peripheral nervous system(PNS).
-they connect the CNS to sensory receptors, muscles, and glands in all parts of the body.
-there are 31 pairs of these nerves.
- 8 pairs of cervical nerves
- 12 pairs of thoracic nerves
- 5 pairs of lumbar nerves
- 5 pairs of sacral nerves
- 1 pair of coccygeal nerves
Protective Coverings of the Spine → - the axon and its associated glial cells form this.
- is a process projecting from the cell body of a neuron.
Reflexes & Reflex Arcs: AUTONOMIC (visceral) REFLEXES → - these reflexes generally are not consciously perceived. They involve responses of smooth muscle, cardiac muscle, and glands.