Lab 13: CNS, PNS, and Function

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Last updated 9:08 AM on 7/16/26
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30 Terms

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Posterior, dorsal

Back side of the body or spinal cord. In the spinal cord, it receives SENSORY (afferent) information.

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Anterior, ventral

Front side of the body or spinal cord. In the spinal cord, it sends MOTOR (efferent) commands to muscles.

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Afferent

Nerve fibers that carry sensory information from receptors TO the central nervous system (brain and spinal cord).

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Efferent

Nerve fibers that carry motor commands FROM the central nervous system to muscles and glands.

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Posterior horn

Gray matter.

Sensory neuron cell bodies/interneurons.

Receives sensory information.

2 in IMAGE.

<p>Gray matter.</p><p>Sensory neuron cell bodies/interneurons.</p><p>Receives sensory information.</p><p><strong>2 in IMAGE.</strong></p>
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Sensory

POSTERIOR HORN’s function SENSORY, MIXED or MOTOR?

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Anterior horn

Gray matter.

Somatic motor neuron cell bodies.

Sends signals to skeletal muscle.

1 in IMAGE.

<p>Gray matter.</p><p>Somatic motor neuron cell bodies.</p><p>Sends signals to skeletal muscle.</p><p><strong>1 in IMAGE.</strong></p>
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Motor

ANTERIOR HORN’s function SENSORY, MIXED or MOTOR?

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Lateral horn

Gray matter.

Autonomic motor neuron cell bodies.

Sympathetic output (T1–L2).

<p>Gray matter.</p><p>Autonomic motor neuron cell bodies.</p><p>Sympathetic output (T1–L2).</p>
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Motor

LATERAL HORN’s function SENSORY, MIXED or MOTOR?

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Posterior root ganglion

PNS.

Sensory neuron cell bodies.

<p>PNS.</p><p>Sensory neuron cell bodies.</p>
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Sensory

POSTERIOR ROOT GANGLION’s function SENSORY, MIXED or MOTOR?

<p>POSTERIOR ROOT GANGLION’s function SENSORY, MIXED or MOTOR?</p>
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Posterior root

Sensory axons entering spinal cord.

<p>Sensory axons entering spinal cord.</p>
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Sensory

POSTERIOR ROOT’s function SENSORY, MIXED or MOTOR?

<p>POSTERIOR ROOT’s function SENSORY, MIXED or MOTOR?</p>
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Anterior root

Motor axons leaving spinal cord.

<p>Motor axons leaving spinal cord.</p>
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Motor

ANTERIOR ROOT’s function SENSORY, MIXED or MOTOR?

<p>ANTERIOR ROOT’s function SENSORY, MIXED or MOTOR?</p>
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Posterior ramus

Mixed nerve.

Supplies back muscles and skin.

<p>Mixed nerve.</p><p>Supplies back muscles and skin.</p>
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Mixed

POSTERIOR RAMUS’ function SENSORY, MIXED or MOTOR?

<p>POSTERIOR RAMUS’ function SENSORY, MIXED or MOTOR?</p>
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Anterior ramus

Mixed nerve.

Supplies limbs and anterior/lateral trunk.

<p>Mixed nerve.</p><p>Supplies limbs and anterior/lateral trunk.</p>
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Mixed

ANTERIOR RAMUS’ function SENSORY, MIXED or MOTOR?

<p>ANTERIOR RAMUS’ function SENSORY, MIXED or MOTOR?</p>
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Rami communicantes

Mixed fibers.

Connect spinal nerve to sympathetic trunk.

<p>Mixed fibers.</p><p>Connect spinal nerve to sympathetic trunk.</p>
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Mixed

RAMI COMMUNICANTES‘ function SENSORY, MIXED or MOTOR?

<p>RAMI COMMUNICANTES‘ function SENSORY, MIXED or MOTOR?</p>
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Sympathetic trunk ganglion

PNS.

Sympathetic motor neuron cell bodies.

<p>PNS.</p><p>Sympathetic motor neuron cell bodies.</p>
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Motor

SYMPATHETIC TRUCK GANGLION’s function SENSORY, MIXED or MOTOR?

<p>SYMPATHETIC TRUCK GANGLION’s function SENSORY, MIXED or MOTOR?</p>
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Sensory

POSTERIOR FUNICULUS’ function SENSORY, MIXED or MOTOR?

<p>POSTERIOR FUNICULUS’ function SENSORY, MIXED or MOTOR?</p>
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Mixed

LATERAL FUNICULUS’ function SENSORY, MIXED or MOTOR?

<p>LATERAL FUNICULUS’ function SENSORY, MIXED or MOTOR?</p>
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Mixed

ANTERIOR FUNICULUS’ function SENSORY, MIXED or MOTOR?

<p>ANTERIOR FUNICULUS’ function SENSORY, MIXED or MOTOR?</p>
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Sensory, mixed, motor

What are the three types of FUNCTIONS?

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Horns, posterior root ganglion, sympathetic trunk ganglion

What are STRUCTURES are CELL BODIES?

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Roots, funiculus, ramus, rami communicantes

What are STRUCTURES are AXONS?