Spinal Cord and Meninges HK*3401

What structure is this and what vertebrae does it occur at

Medullary cone, at L2

Name these 2 structures

Dural sac (extends to proximal sacrum)

Cauda Equine (circled)

Bundle of root nerves

Name these 3 sections of spinal nerve

Medullary cone

terminal filament

Cauda Equine

Where does this nerve exit?

Intervertebral foramen

How are spinal nerves formed branching out from spinal cord?

Rootlets (ant post) → Roots (ant post) → Spinal Nerve → Rami (ant post) divides to form rami

Name all the labels

Rootlets

Roots

Spinal nerve

Rami

Order of Motor information flowing away from spinal cord

Spinal Cord – Anterior Rootlets – Anterior root – Spinal Nerve -- Rami

Order of sensory information flowing towards spinal cord

From Periphery – Rami – Spinal Nerve – Posterior Root – Posterior Rootlets – Spinal Cord

What information do Anterior Rootlets/Roots carry

Spinal Nerves
Contain Efferent/Motor Fibers to
Skeletal Muscle

What information do Posterior Rootlets/Roots carry

Contain Afferent/Sensory Fibers from
Skin; Subcutaneous and Deep Tissues; Viscera

Do rootlets and roots carry sensory info motor info or both?

One or the other, never both. Spinal nerves and Ramus can carry both

name the three layers and the starred ligament

Dura mater

Arachnoid mater

Pia mater

Denticulate Ligament (Derived from pia mater)

Name the spaces between the Mater

Epidural space

Sub Dural

Subarachnoid space (contains cerebral fluid)

Name every part of this diagram

Left side:

Dura

Arachnoid

Pia'

Denticulate ligament

Terminal filament

Right side:

Rootlets

Roots