SCC Cole Spinal Cord and Spinal Nerve Anatomy Lab

50 terms by sherylmiller

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Anatomy and Physiology

Nerve

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):

Epineurium

Identify A: outermost layer of connective tissue on the spinal nerve; a dense network of collagen fibers

Perineurium

Identify B: coarse connective tissue that bundles fibers into fascicles

Endoneurium

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

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