5 Written questions
5 Matching questions
- Internal Anatomy of Spinal Cord: POSTERIOR(dorsal) GRAY HORNS
- Internal Anatomy of Spinal Cord: LATERAL GRAY HORNS
- Protective Coverings of the Spine
- Spinal Nerve Branches: RAMUS
- The Major Plexuses: LUMBAR PLEXUSES
- a - the roots (anterior rami) of spinal nerves L1-L4 form this plexus.
- there is minimal intricate intermingling of fibers in this plexus.
-this plexus supplies the anterolateral abdominal wall, external genitals, and part of the lower limbs.
- the Femoral & Obturator nerve arise from this plexus.
*more info on pg 600-601
- b - 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
- c - contain cell bodies and axons of interneurons as well as axons of incoming sensory neurons.
- 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 - 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.
5 Multiple choice questions
- - 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
- - these reflexes involve contraction of skeletal muscles.
- - these are components of the autonomic nervous system(ANS)
- - 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.
- - first way spinal cord promotes homeostasis is by conducting nerve impulses along tracts.
- often, the name of a tract indicates its position.
5 True/False questions
Internal Anatomy of Spinal Cord: ANTERIOR(ventral) GRAY HORNS → - contain somatic motor nuclei, which are clusters of cell bodies of somatic motor neurons that provide nerve impulses for contraction of skeletal muscles.
Reflexes & Reflex Arcs: SPINAL REFLEX → - integration takes place in the spinal cord gray matter for this reflex.
- example of this type of reflex is the patellar reflex(knee jerk).
Meninges: PIA MATER → - this is the innermost meninx (meninges).
- is a thin transparent connective tissue layer that adheres to the surface of the spinal cord and brain.
- consists of thin squamous to cuboidal cells w/in interlacing bundles of collagen fibers and some elastic fibers.
- contains many blood vessels that supply oxygen and nutrients to the spinal cord.
*Subarachnoid Space - this is the space b/w the arachnoid mater and pia mater. contains cerebral spinal fluid that serves as shock absorber and suspension system for spinal cord and brain.
Dermatomes → - 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.
Spinal Nerve Branches: POSTERIOR (dorsal) RAMUS → - 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.