Fundamentals of the Nervous System

Nervous System is divided
structurally into...

Nervous System is divided
functionally into...

Central Nervous System

Peripheral Nervous System

What is the functional unit of the nervous system?

What are neurons composed of?

Neuronal axons (nerve fibers)

Sensory Nerves

Nucleus

Ganglion

Tract

Nerve

Cranial Nerves

Spinal Nerves

Nervous tissues consists of 2 types of cells

What 3 layers make up the meninges/spinal cord?

Pia mater

Where is the cerebrospinal fluid located?

Dura Mater

What separates the dura mater from vertebral column?

Peripheral Nervous System Function

Central Nervous System Function

Nerve Fiber consists of...

Neurolemma

Nerve fibers are supported and protected by...

PNS consists of what 2 nerve fibers?

Afferent fibers

Efferent Fibers

Cranial Nerves

Spinal Nerves

Spinal Level vs Vertebral Level

Where do spinal nerves originally arise from?

Rootlets converge into 2 nerve roots...

Anterior Nerve Roots

Posterior Nerve Roots

What forms when posterior and anterior nerve roots unite?

What happens after the spinal nerve forms from the posterior and anterior nerve roots?

Dermatome

Myotome

Posterior (primary) rami of spinal nerves

Anterior (primary) rami of spinal nerves

Somatic Fibers

Somatosensory Fibers

Somatic Motor

Visceral Fibers

Visceral sensory fibers

Visceral Motor Fibers

Somatic Nervous System