RABBIT (MAMMALS) CRANIAL NERVES AND THEIR NAMES ORIGIN, NATURE, AND DISTRIBUTION
|
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 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- |
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 |