Friday, December 25, 2015

Cranial nerves: Types, innervations and functions



Name
Types of fibre
Organs innervated
Functions
1.    Olfactory
Sensory
Olfactory mucus membranes
Smell
2.    Optic
Sensory
Retina
Vision
3.    Oculomotor
Motor
Eyeball muscles
Eyeball movement, control ciliary muscles, tear gland
4.    Trochlear
Motor
Eyeball muscles
Eyeball movement
5.    Trigeminal
Mixed
Skin, oral mucosa, muscles of head, face, mouth
Cutaneous sensation, muscle movement
6.    Abducens
Motor
Eyeball muscles
Eyeball movement
7.    Facial
Mixed
Taste buds, salivary glands, facial and neck muscles
Taste, salivation, movement, tear secretion,
8.     Vestibulo-cochlear (auditory nerve)  
Sensory
Internal ear
Hearing, equilibrium
9.     Glosso-pharyngeal 
Mixed
Pharynx, salivary glands, tongue
Taste, salivation, swallowing
10. Vagus 
Mixed
Pharynx, respiratory tract, heart, pancreas, alimentary canal, blood vessels
Gastric and pancreatic secretion, cardiac slowing, gastro-intestinal movement, respiratory reflexes, vasomotor reflexes
11. Spinal accessory
Motor
Neck & shoulder muscles, thoracic and abdominal viscera
Muscle movements, visceral reflexes
12. Hypoglossal
Motor
Muscles of the tongue
Tongue movements

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