Bio210 Exercise 21: Spinal Cord and Spinal Nerves

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updated 5 years ago by ttcbio210
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College: Fourth year
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Spinal Cord

The spinal cord is continuation of the brain stem. The size of your thumb except at cervical enlargement and lumbar enlargement.

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Does this picture contain the correct terms?

Yes

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Does this picture contain the correct terms?

Yes

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Does this picture contain the correct terms?

Yes

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Does this picture contain all the Plexus of the spine?

No. It is missing...

Cervical plexus (Plexus collection of nerves) C1- C5 supply muscles of shoulder and neck, phrenic nerve innervates the diaphragm

Brachial plexus (Plexus collection of nerves) C5 – C8, T1, forms 5 major nerves that innervate the arm, median nerve

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What is the area(B) called?

Cervical enlargement

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What is the area (C) called?

Lumbar enlargement

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What is the area (D) called?

Conus medullaris

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What is the area (E) called?

Filum terminale

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What is the area (F) called?

Cauda equine (Looks like horse hairs)

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Number 3 is ?

Posterior horn
Dorsal (posterior) horn – more pointed, contains interneurons and sensory fibers

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Number 11 is?

Anterior horn
Ventral (anterior) horn – broader, contains cell bodies of motor neurons of somatic nervous system (voluntary)

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Number 6 is?

Lateral horn
Lateral out pocketing, only in thoracic and lumbar region, contains cell bodies of motor neurons of autonomic nervous system

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Number 8 is the area connecting sides?

Gray commissure
Gray matter connecting sides.

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Number 14 is the?

Central canal opening
Contains CSF, continuous with the ventricles

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Number 2 is?

Posterior white columns(funiculus)
White matter – outer, tracts of myelinated axons

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Number 10 is?

Anterior white columns(funiculus)
White matter – outer, tracts of myelinated axons

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Number 12 is?

Lateral white columns(funiculus) White matter – outer, tracts of myelinated axons

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Number 1 is?

Dorsal median sulcus

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Number 9 is?

Ventral median fissure

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Number 13 is?

Dorsal root

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Number 4 is?

Dorsal root ganglion
They are only seen on the dorsal side.

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Number 7 is?

Ventral root.
They come off the front. No ganglion on the front skinny root wires.

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Arrows and circles point at and highlight an yellow object called? The object has 31 pairs...

Spinal nerve 31 pairs