Term
| Spinal Cord begins where? |
|
Definition
| superiorly at foramen magnum |
|
|
Term
|
Definition
| inferiorly at the level of the L1/L2 intervertebral disc |
|
|
Term
| Two enlargements of spinal cord? |
|
Definition
|
|
Term
| Cervical enlargement extends from? |
|
Definition
| C5-T1 Spinal cord segments |
|
|
Term
| Cervical enlargement innervates? |
|
Definition
|
|
Term
| Cervical enlargement gives rise to? |
|
Definition
|
|
Term
| Lumbosacral Enlargement extends from |
|
Definition
| L1-S3 spinal cord segments |
|
|
Term
| Lumbosacral Enlargement gives rise to? |
|
Definition
|
|
Term
| Lumbosacral Enlargement innervates |
|
Definition
|
|
Term
| What is the Conus Medullaris? |
|
Definition
| The inferior extend of the spinal cord tapers off in a cone shape |
|
|
Term
| What is the Filum Terminale |
|
Definition
| A connective tissue filament that extends from the conus medullar is to the coccyx where it attaches. |
|
|
Term
|
Definition
| Spinal nerve roots that extend inferiorly below the conus medullar is |
|
|
Term
| In the embryo, up to the 8th week of development, the spinal cord runs where? |
|
Definition
| entire length of the vertebral canal |
|
|
Term
| The nerve course from spinal cord to vertebral canal exit point is long or short? |
|
Definition
|
|
Term
| Beginning in the third month of development, the vertebral column begins what? |
|
Definition
| lengthening faster than the spinal cord. |
|
|
Term
| In order to maintain innervation in the face of the differential growth, the spinal nerve roots do what? |
|
Definition
|
|
Term
| Spinal nerve roots descend obliquely from where to where |
|
Definition
| spinal cord to the intervertebral formina |
|
|
Term
| Which nerve roots become especially long? |
|
Definition
|
|
Term
| Nerve roots descending below the conus medullaris form the? |
|
Definition
|
|
Term
| What is the Anterior Median Fissure? |
|
Definition
| A deep groove along the anterior midline, contains anterior spinal vessels. |
|
|
Term
| What is the Posterior Median Sulcus |
|
Definition
| shallow groove along posterior midline |
|
|
Term
| What is the anterolateral Sulcus |
|
Definition
| attachment area of the rootlets of the anterior roots of the spinal nerves. |
|
|
Term
| What is the Posterolateral Sulcus |
|
Definition
| Attachment area of the rootlets of the posterior roots of the spinal nerves. |
|
|
Term
| What is the Posterior Intermediate Sulcus |
|
Definition
| Located between the posterior median sulcus and the posterolateral sulcus. Only present in the cervical and upper thoracic regions. |
|
|
Term
| Three parts of the Spinal Cord |
|
Definition
| Central Canal, Gray Matter, White Matter. |
|
|
Term
| What is the Central Canal |
|
Definition
| narrow cavity in center of spinal cord, communicates with the 4th ventricle of the brain, lined by ependymal cells. |
|
|
Term
| what are the four regions of the gray matter |
|
Definition
| posterior horn, anterior horn, lateral horn, intermediate zone. |
|
|
Term
| Function of posterior horn? |
|
Definition
|
|
Term
| Anterior horn is mostly involved with? |
|
Definition
|
|
Term
| anterior horn is large in what enlargements? |
|
Definition
| cervical and lumbosacral. |
|
|
Term
| lateral horn has what type of neurons? |
|
Definition
| preganglionic sympathetic neurons. |
|
|
Term
| ___ nucleus forms the lateral horn |
|
Definition
|
|
Term
| Where is the intermediate zone located? |
|
Definition
| between anterior and posterior horns, continuous medially with the gray matter around the central canal. |
|
|
Term
| Intermediate zone consists primarily of interneurons for? |
|
Definition
| segmental and intersegmental integration of spinal functions. |
|
|
Term
| three regions of the white matter of the spinal cord? |
|
Definition
| Posterior funiculus, lateral funiculus, anterior funiculus. |
|
|
Term
| white matter consists of ____ and _____ fibers |
|
Definition
| ascending and descending. |
|
|
Term
| Spinal nerves are formed by? |
|
Definition
| The union of two roots that enter and leave the spinal cord |
|
|
Term
| What does the anterior root consist of? |
|
Definition
| Nerve fibers carrying information away from the spinal cord (efferent, motor fibers) |
|
|
Term
| What does the posterior root consist of |
|
Definition
| Nerve fibers carrying information toward the spinal cord (afferent, sensory fibers), Contains a ganglion that contains the cell bodies of the sensory neurons (posterior root ganglion) |
|
|
Term
| spinal nerves are mixed nerves that contain what two types of fibers |
|
Definition
|
|
Term
| After exiting the vertebral canal, spinal nerves divide into what two branches |
|
Definition
| Posterior Ramus (smaller), Anterior Ramus(larger). |
|
|
Term
| What does posterior ramus innervate? |
|
Definition
| skin and deep muscle of back |
|
|
Term
| Anterior ramus innervates? |
|
Definition
| skin and muscle of limbs and anterolateral trunk as well as superficial muscles of back |
|
|
Term
|
Definition
| area of skin innervated by the sensory fibers of a given spinal nerve |
|
|
Term
| ___ fibers from a single spinal nerve usually reach the skin in more than one cutaneous nerve |
|
Definition
|
|
Term
| cutaneous nerves usually contain ___ fibers from more than one spinal nerve |
|
Definition
|
|
Term
| The spinal cord is covered by? |
|
Definition
|
|
Term
| the meninges are 3 connective tissue membranes? |
|
Definition
| dura mater, arachnoid, pia mater. |
|
|
