I. Olfactory:  Sensory nerves for smell
II. Optic: Sensory nerve for vision.
III. Oculomotor: Somatic & Parasympathetic:  control of extrinsic eye muscles and pupil dilation.
IV. Trochlear: Somatic control of muscles that surround the eye.
V. Trigeminal: Sensory & Somatic control of facial nerves and muscles for chewing.
VI. Abducens:  Somatic muscle control of lateral movement of the eyeball.
VII. Facial: Sensory, Somatic & Parasympathetic control over facial expression and taste.
VIII. Vestibulocochlear or Auditory Nerve: Sensory  nerve for hearing.
IX. Glossopharyngeal: Sensory, Somatic & Parasympathetic control over taste, the tongue and the pharynx.
X. Vagus Primary Parasympathetic  nerve with some Somatic and Sensory functions. Controls visceral organs.
XI. Accessory:  Somatic control over larynx, pharynx and sternocleidomastoid muscles
XII. Hypoglossal: Somatic control over the tongue.

A). 31 pairs of spinal nerves 

named for the points of issue and branch into nerve plexuses that are named for the location.

	Spinal roots
	Rami
	Nerve Plexus are interlaced nerve networks that form when the rami join together.

B). Somatic and Sensory nerves

1). C1 to C8 cervical nerves

a). Cervical plexus

	Deep in neck under sternocleidomastoid muscle.
	Works muscles in the neck, scapulae, trapezius, and diaphragm. (C3 to C4)

Sensory skin in neck, ear, and chest.

b). Brachial plexus

	Found partly in the neck and axilla.
	All of the nerves that innervate the upper limbs. (C5 to C8)

 

i). Axillary nerve: Deltoid & Teres minor

ii). Musculocutaneous nerve: Biceps brachii, brachialis and skin.

iii). Median nerve: Flexor muscles, wrist & fingers.

iv). Ulnar nerve: flexors not covered by median nerve. (Funny bone pain)

v). Radial nerve: Extensor muscle and skin.

 

2). T1 to T 12 thoracic nerves

a). Intercostal nerves

Supply intercostal muscles, abdominal wall and branch into the skin.

3). L1 to L 5 lumbar nerves

a). Lumbar plexus

L1 to L4 Innervates abdominal wall and interior and medial thigh.

 

i). Femoral nerve: Skin and quadriceps.

ii). Obturator nerve: Adductor muscles

iii).  Saphenous nerve

 

4). S1 to S5 sacral nerves

a). Sacral plexus

	L4 to S4 Buttock and lower limb

i). Sciatic nerve: Posterior thigh, hamstrings, flexors and extensors

ii). Tibial nerve: part of sciatic Posterior calf and foot.

iii). Common fibular nerve (peroneal): part of sciatic. Knee joint and anterolateral lower leg muscles.

 

5). C0 coccygeal nerve