Gross Anatomy of the Spinal Cord

Flashcards covering key terminology and concepts related to the gross anatomy of the spinal cord and its functions.

Spinal Meninges

Protective coverings of the spinal cord, consisting of three layers: dura mater, arachnoid mater, and pia mater.

Dura Mater

The outermost layer of the spinal meninges, providing a tough protective covering.

Arachnoid Mater

The middle layer of the spinal meninges, resembling a spider web and enclosing the subarachnoid space.

Pia Mater

The innermost layer of the spinal meninges that is tightly adhered to the spinal cord.

Cervical Plexus

A network of nerves formed by the ventral rami of the cervical spinal nerves, including the phrenic nerve.

Brachial Plexus

A network of nerves that arises from the brachial region, including major nerves such as the axillary, radial, and ulnar nerves.

Monosynaptic Reflex

A reflex involving a simple connection between a sensory neuron and a motor neuron, such as a stretch reflex.

Polysynaptic Reflex

A reflex that involves one or more interneurons between sensory and motor neurons, such as the withdrawal reflex.

Dermatome Maps

A map that shows the areas of skin innervated by specific spinal nerves.

Anterior Spinal Artery

A single artery that supplies blood to the anterior portion of the spinal cord.