50 terms

SCC Cole Spinal Cord and Spinal Nerve Anatomy Lab

Anatomy and Physiology
a bundle of axons in the PNS
Vertebral Canal
Name this space: the canal in successive vertebrae through which the spinal cord passes
Cervical Enlargment
Identify A:In the neck region, a thickening in the spinal cord that supplies the nerve to the upper limbs
Lumbar Enlargement
Identify B: an enlargement of the spinal cord that gives rise to the nerves of the pelvic region and lower limbs
Cauda Equina
Identify C: collection of spinal nerves below the end of the spinal cord
Medullary Cone
Identify D: cord tapers to a point inferior to lumbar enlargement
Terminal Filum
Identify A: fibrous strand of pia mater that extends beyond the medullary cone within the lumbar cistern
Posterior Median Sulcus
Identify J:, shallow longitudinal groove on the dorsal surface of the spinal cord
Anterior Median Fissure
Identify K:
Central Canal
Identify A: The narrow cavity in the center of the spinal cord that is continuous with the fluid-filled ventricles of the brain.
31 Pairs
How many spinal nerves are there?
Cervical Nerve
Identify this group of nerves: any of eight pairs of spinal nerves emerging from the cervical section of the spinal cord
Thoracic Nerve
Identify B: any of twelve pairs of spinal nerves emerging from the thoracic region of the spinal cord
Cervical Nerve
Identify A
Lumbar Nerve
Identify C:, any of five pairs of spinal nerves emerging from the lumbar section of the spinal cord
Sacral Nerve
Identify D: any of five pairs of spinal nerves emerging from the sacral region of the spinal cord
Coccygeal Nerve
Identify E: the lowest pair of spinal nerves
Dorsal Nerve Root
Idenyify C: The branch off each side of the spinal cord between each set of adjacent vertebrae that conducts sensory impulses into the spinal cord from the periphery of the body.
Dorsal Root Ganglion
Identify D: a nodule on a dorsal root that contains cell bodies of neurons in afferent SPINAL NERVES.
Posterior Horn
Identify E:
Ventral Nerve Root
The branch off each side of the spinal cord between each set of adjacent vertebrae that conducts motor impulses from the spinal cord to effectors in the periphery of the body.
Dorsal Ramus
Identify A:
NOTE: observe shape of grey matter for orientation
Ventral Ramus
Identify B:
Meningeal Ramus
One of the first three branches of each spinal nerve, this smallest branch turns back through the intervertebral foramen to supply the spinal meninges and the blood vessels of the spinal meninges.
Rami Communicantes
Identify 16:
Sympathetic Ganglion
Identify 10: enlargments of sympathetic trunk contains postganglionic sympathetic cell bodies
Anterior Horn
Identify H:
Gray Commisure
Identify C: structure that connects the right and left parts of the gray matter of the spinal cord
Posterior Column
Identify L: between the posterior gray horns and the posterior median sulcus
Lateral Column
Identify M: White matter on either side between the anterior and posterior columns
Anterior Column
Identify N: lies between the anterior gray horns and the anterior median fissure.
-interconnected by the anterior white commisure.
Denticulate Ligament
Identify 21: ligaments between spinal nerves
Denticulate Ligament
Identify A: Ligaments between spinal nerves
Spinal Meninges
Surround the spinal cord and are continuous with the cranial meninges.
Dura Mater
Identify 6:
Subdural Space
Identify B (space):
Arachnoid Space
Identify A (space):
Pia Mater
Identify E (space):
Identify A: outermost layer of connective tissue on the spinal nerve; a dense network of collagen fibers
Identify B: coarse connective tissue that bundles fibers into fascicles
Identify C: delicate connective tissue around individual nerve fibers in nerve
Cervical Plexus
a nerve plexus lying beneath the sternocleidomastoid muscle
Phrenic Nerve
Identify the nerve that the arrow is pointing to: stimulates the diaphragm and causes it to contract
Brachial Plexus
a network of nerves formed by cervical and thoracic spinal nerves and supplying the arm and parts of the shoulder
Radial Nerve
Identify 5: largest branch of the brachial plexus
Ulnar Nerve
Identify 4:, a nerve running along the inner side of the arm and passing near the elbow
Lumbar Plexus
a plexus of nerves formed by the ventral branches of the first four lumbar nerves
Femoral Nerve
Identify A: innervates quadriceps and skin of anterior thigh and medial surface of leg
Sacral Plexus
a nerve plexus formed by the 4th and 5th lumbar and 1st, 2nd, 3rd sacral nerves
Sciatic Nerve
Identify A: arises from the sacral plexus and passes about halfway down the thigh where it divides into the common peroneal and tibial nerves