Spinal Nerve Pictures (Lab), Spinal Cord Anatomy Pictures Practical

Pia Mater

innermost layer of spinal cord

Arachnoid Mater

located between pia mater and dura mater

Dura Mater

Outermost layer

Dorsal Root Ganglion

afferent nerve

Ventral Root

efferent nerve (outgoing)

Posterior Median Sulcus

Anterior Median Fissure

dorsal horn

Of gray matter

Ventral Horn

of Gray Matter

Lateral Horn

of Gray Matter

Gray Commissure

of gray matter

Dorsal Funiculus

of White Matter

Ventral Funiculus

of White Matter

phrenic nerve (cervical plexus)

identify nerve and plexus

ulnar nerve (brachial plexus)

nerve and plexus

radial nerve (brachial plexus)

nerve and plexus

median nerve (brachial plexus)

nerve and plexus

femoral nerve (lumbar plexus)

nerve and plexus

sciatic nerve (sacral plexus)

nerve and plexus

Obturator Nerve lumbar plexus

nerve an plexus

dorsal root ganglion

SENSORY

white matter

Groups of axons travelling together myelin

Ventral Root

Contains efferent (outgoing) MOTOR fibres within the spinal cord

gray matter

get color from cell bodies

dorsal median sulcus

indentation

Central canal

This runs the length of the spinal cord

gray commisure

surrounds the central canal.

dorsal horn

gray matter

Ventral horn

gray matter

lateral horn

gray matter

Anterior funiculus

white matter

ventral median fissure

identification

Conus medullaris

end of the spinal cord (around L1 and L2)

cauda equina

Fibers at end of spinal cord-begins at conus medullaris

(horses tail)

dura matter

tough,OUTER, single-layered membrane

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Cervical Plexus (C1-C5)

Phrenic nerve

Nerve associated: nerve and plexus

brachial plexus (C5-C8 AND T1)

Nerve associated: axillary nerve

radial nerve

ulnar nerve

median nerve

musculocutaneous nerve

Lumbar Plexus (L1-L4)

Femoral nerve B

Obturator nerve C

identify nerve A&B and which plexus

Sacral Plexus (L4-S4)

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sciatic nerve

fibular (common peroneal) nerve

tibial nerve

reflex arc

Step 1. receptor-site of stimulus

Step 2. Sensory neuron-carries/afferent to CNS

Step 3. integration center-located in gray matter of CNS turns from sensory to motor

Step 4: motor neuron- carries efferent to effector

Step 5: effector- muscle (skeletal, smooth or cardiac) or gland

(R,S,I,M,E)

pia mater

highly vascular membrane of meninges which attaches directly to the brain and spinal cord and follows the contours, supports the blood vessels that supply the brain and spinal cord, contributes to choroid plexus

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arachnoid mater

a net like membrane of the meninges located between the dura mater and the pia mater

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