A&P Lab Spinal Cord Spinal Nerves and the Autonomic Nervous System

The ____ (saw toothed shelves of pia mater) secure the spinal cord to the vertebral column all along its length.

The spinal cord extends from the foramen magnum of the skull to the first or second lumbar vertebrae and terminates at the _____

The meninges of the brain extend all the way down the spinal cord where the ____, the fibrous extension of the pia mater, extends to attach to the posterior coccyx.

The ____ is a collection of spinal nerves transversing the inferior end of the vertebral canal, and is called such due to the similarity it has to a horse's tail.

____: a procedure to remove cerebral spinal fluid for analysis when bacterial or viral infection is suspected, usually performed below L3

____ (caudal anesthesia): a procedure for childbirth, usually administered between L3 and L5.

The spinal cord is about the size of the index finger in circumference for most of its length except at the cervical and lumber regions due . . .

The two dorsal projections are the dorsal (posterior) horns, which contain interneurons and sensory fibers, and connect to the peripheral nervous system through the ____.

The dorsal root ganglion is an enlarged region that contains the cell bodies of _____.

The two dorsal projections are the ____, which contain interneurons and sensory fibers, and connect to the peripheral nervous system through the ____.

The ____ is an enlarged region that contains the cell bodies of sensory neurons.

The two ventral projections are the ____, which contain cell bodies of motor neurons from the somatic nervous system, and send their axons through the ____.

____ are the fusion of dorsal and ventral roots.

The outpocketing of gray matter in the thoracic and lumbar regions are the ____, which contain nerve cell bodies of motor neurons of the sympathetic nervous system

The ____ is the central area that connects the two vertical regions of gray matter together and surrounds the ____, which contains cerebral spinal fluid.

The white matter is bisected by the ventral median fissure and the dorsal median sulcus, which forms the ____, ____, and ____.

Tracts conducting sensory impulses to the brain are ____ (sensory) tracts

Tracts conducting impulses from the brain are ____(motor) tracts

Spinal Conditions:

____ (paralysis of two limbs) or ____ (paralysis of four limbs) can occur when the spinal cord is transected causing all sensory and motor function to be lost.

The ___ pairs of spinal nerves arise from the fusion of dorsal and ventral roots of the spinal cord.

All spinal nerves are mixed nerves because they contain both sensory (dorsal root) and motor (ventral root) fibers.

Each spinal nerve divides into the ____ , which serve the skin and musculature of the posterior body, and ____ , which serve the motor and sensory needs of the muscles of the skin and limbs and form ____.

The cervical plexus arises from the ventral rami of C1 through ____ to supply the shoulder and neck muscles.

The ____ arises from the ventral rami of C1 through C5 to supply the shoulder and neck muscles.

Cervical Plexus:
The major motor branch is the ____ nerve, which arises from C3 through C4 and passes into the thoracic cavity.

The ____ arises from the ventral rami of C5 through C8 and T1, and is subdivided into five major peripheral nerves:

Brachial Plexus: 

Subdivided into five major peripheral nerves

List them.

The _____, which serves the pelvic region and lower limbs, is a complex of two plexuses.

The lumbar plexus arises from the ventral rami of ___ through ___, and serves the lower abdominopelvic region and the anterior thigh.

The _____ arises from the ventral rami of L1 through L4, and serves the lower abdominopelvic region and the anterior thigh.

Lumbar Plexus: 

The ____ is the largest nerve in this plexus.

The sacral plexus arises from the ventral rami of ___ through ____ and supplies the buttocks, posterior surface of the thigh and all sensory and motor fibers of the leg and foot.

The ____ arises from the ventral rami of L4 through S4 and supplies the buttocks, posterior surface of the thigh and all sensory and motor fibers of the leg and foot.

Sacral Plexus:

The ____ nerve is the largest nerve in the body, and at the popliteal region it divides into the ____ and _____.

The ____ is a subdivision of the peripheral nervous system that regulates body activity not under conscious control.

The ANS has two major subdivisions, the ____ and ____ divisions.