Cranial nerves

Cranial nerves I

(olfactory) - responsible for smell

cranial nerves II

(optic) - responsible for vison

cranial nerves III

(oculomotor) - originates in midbrain, visceral and somatic motor components, and eye movement/dilation

cranial nerves IV

(trochealer) - smallest, eye movement

cranial nerves V

(trigeminal) - largest, 3 branches(opthalmic, maxillary, mandibular), motor axon supply, and sensory portion

Cranial nerves VI

(abducens) - responsible for abduction of the eye

Cranial nerves VII

(facial nerves) - responsible for a part of taste, facial expressions

Cranial nerves VIII

(vestibulocochlear) -  originates from inner ear, vestibular branch carries impulses for equilibrium

cranial nerve IX

(glossopharyngeal) -  lifts throat during swallowing, motor neurons arise from the medulla and control release saliva from parotid gland

Cranial nerves X

(vagus) - distributed from head and neck into thorax and abdomen, sensory neuron seal with proprioception and stretching controls cardiac and smooth muscles of viscera, controls secretion of digestive fluids

cranial nerves XI

(Accessory) - divided into cranial accessory and spinal nerves, cranial portion[ arises medulla, skeletal muscle of throat and soft palate], spinal portion[arise cervical spinal cord sternocleidomastoid and trapezius coordinate head movements] 

Cranial nerves XII

(hypoglossal) - conduct nerve impulses for speech and swallowing, controls muscle of tongue during speech and swallowing