ANATOMY OF THE SPINAL CORD spinal cord - nervous tissue that arises from the bra

Question

ANATOMY OF THE SPINAL CORD spinal cord - nervous tissue that arises from the brainstem at the foramen magnum of the skull, passes through the 1. inferior margin ends at L1 or a little beyond 2. averages 1.8 cm thick and 45 cm long 3. occupies the upper two thirds of the vertebral canal 4. gives rise to 31 pair of spinal nerves 1st pair passes between the skull and c1 rest pass through intervertebral foramina ACTIVITY: Assuming in the order from superficial (# 1) to the deep (#16) that you are viewing a magnetic resonance imaging (MRI] of the thoracic vertebral region, arrange the structures you will see skeletal muscle stratum spinosum epidural space pia matter central canal hypodermis dura matter stratum granulosum arachnoid matter gray matter of spinal cord vertebral bone -stratum corneum -subarachnoid space white matter of spinal cord stratum basale _ subdural space ACTIVITY: Observe and identify the cervical and lumbar enlargements of the spinal cord in the model. What is the structural and functional significance of these enlargements? Cervical enlargement: Lumbar enlargement:

Explanation / Answer

Superficial to deep-

Stratum corneum

Stratum granulosum

Stratum spinosum

Stratum basale

Hypodermis

Skeletal muscle

Epidural space

Dura mater

Subdural space

Arachnoid mater

Subarachnoid space

Pia mater

Vertebral bone-mid

White matter of spinal cord

Gray matter of spinal cord

Central canal

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