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SI. Name of the No. Cranial nerve

Branches

Nature

Origin

Distribution

1. Olfactory nerve

Purely somatic sensory nerve.

Anterior end of olfactory lobe.

Mucous membrane of the nasal sacs.

2. Optic nerve

Purely somatic sensory nerve.

Ventro-lateral part of the optic lobe

Retina of the eye.

3. Occulomotor nerve

 

Somatic motor nerve.

Ventral surface of the midbrain (crura cerebri)

Muscles of the eye (internal, superior rectus, inferior and inferior obliquemuscles)

4. Trochlear nerve (Pathetic)

 

Somatic motor nerve.

Dorsally between the optic lobes and cerebellum

Fifth muscle of the eye (superior obliquemuscle)

5. Trigeminal nerve

a. Opthalmic

b. Maxillary

c. Mandibular

Mixed nerve Somatic sensory nerve Somatic Sensory nerve mixed nerve.

Antero-lateral part of medulla oblongata

a. Skin of snout

b. Skin of the upper
jaw and lower eye lid.

c. Muscles of the lower

jaw and its skin.

6. Abducens nerve

 

Somatic motor nerve

Ventral side of the medulla oblongata

muscles of the eye

7. Facial nerve

a. Palatine

b. Hyomandi-
bular

Mixed nerve Visceral sensory nerve

Visceral motor nerve

Lateral parts of the medulla oblongata

Mucous membrane (roof of the buccal cavity)

Muscles of the lower jaw and hyoid apparattus.

8. Auditory nerve

Somatic sensory nerve

Lateral parts of medulla oblongata

Internal ear (auditory organ)

9. Glossopharyngeal

Sends a branch to the facial nerve.

Mixed nerve (Visceral sensory and visceral motor).

Lateral parts of

medulla

oblongata.

Mucous membrance of tongue, pharynx and muscles of the hyoid.

10. Vagus nerve

a. Cutaneous

b. Cardiac

c. Laryngeal

d. Pulmonary

e. Gastric

Mixed nerve (Somatic, visceral sensory and visceral motor) Sensory nerve Motor nerve Mixed nerve motor nerve mixed nerve

Lateral parts of

medulla

oblongata

Skin of the dorsal body wal Heart

Laryngotracheal chamber

Lungs

Stomach

11. Spinal accessory

 

Motor nerve

Medulla

Muscles of neck

12. Hypoglossal

 

Motor nerve

Medulla

Muscles of tongue

Dictionary:

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