|Name of the nerve||Origin||Branches||Distribution||Physiological Nature|
|1. OLFACTORY||Olfactory lobe.||-||Olfactory epithelium of the nasal cavity.||Sensory|
|2. OPTIC||Optic lobe.||-||Retina of eye.||Sensory|
|3. OCULOMOTOR||Ventrolateral side ofthe midbrain.||-||Anterior rectus, superior rectus, inferior rectus and inferior oblique muscles of the eye. Superior oblique muscle of the eye||Motor Motor|
|4. TROCHLEAR||Dorsolateral aspect of the midbrain between the optic lobes and cerebrum.||-||Olfactory capsule and dorsal||Mixed|
|5. TRIGEMINAL||Dorsally from the side of medulla oblongata below the corpora restiformes.||(i) Opthalmic profundus (ii) Ophthalmicus superfi-cialis V (iii) Maxillaris V (a) Superior (b) Inferior (iv) Mandibularis||skin of the snout. Skin of the snout. Skin of upper jaw Posterior part of upper lip. Muscles of the lower jaw.||Mixed Motor Mixed|
|6. ABDUCENS||Midventrally from the floor of medulla oblongata||-||Posterior rectus muscle of the eye.||Mixed|
|7. FACIAL||From the side of medulla below the corpora restiformes in the form of a bundle.||(i) Opthalmicus super-ficialis VII (ii) Ramus buccalis (iii) Flyomandibularis (a) Mandibularis externus (b) Mandibularis internus (c) Hyoidean (iv) Ramus palatinus||Sense organs; the lateral line system of snout. Infra-orbital lateral line canal and associated ampullae. Mandibular canal of lateral-line system. Mucous membrane of the floor of buccal cavity. Muscles of the roof of buccal cavity and pharynx. Roof of the pharyngeal and buccal cavity.||Mixed Mixed Mixed Mixed Mixed Sensory|
|8. AUDITORY||From the side of medulla close to the V and Vll cranial nerves.||(i) Vestibular (ii) Saccular||Membranous labyrinth of the internal ear||Sensory|
|9. GLOSSOPHARYN GEAL||From the ventro-lateral side of medulla.||(i) Pre-trematic (ii) Post-trematic||Mucous membrane of the first gill-cleft and the pharynx. The muscles of the pharynx Gills.||Sensory Mixed Mixed|
|10. VAGUS||Side of Medulla.||(a) Branchialis (b) Visceralis (c) Lateralis||Viscera. Lateral-line system of the trunk.||Mixed Mixed Mixed|
CRANIAL NERVES OF SCOLIODON (SHARK)
Ten pairs of cranial nerves arise from the brain at different locations to supply the anterior region of the body. In addition to them a pair of terminal or pre olfactory nerves (zero nerves) arises from the ventral surface of the cerebrum.
The ten pairs of cranial nerves are furnished below for detail study.
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