Function/Type
CN VIII
Vestibulocohlear. Sensory. Hearing and balance.
CN VI
Abducens nucleus
This nerve enters the skull through the cribiform plate.
What is the olfactory nerve?
Lateral strabismus is one symptom
What is damage to oculomotor?
The cranial nerves involved in the gag reflex
Vagus and Glossopharyngeal
CN XII
Hypoglossal. Motor. Innervates intrinsic/extrinsic muscles of the tongue.
CNII
Optic nerve but no brainstem nuclei
Enters/exits the brainstem in the posterior pons/midbrain junction
Weakness, paralysis and atrophy of ispilateral muscles of the tongue.
What is damage to the LMN of the Hypoglossal cranial nerve?
The Glossopharyngeal ANS afferent and the Facial ANS afferent have this in common.
Taste
CN VI
Abducens. Motor. Supplies the lateral rectus muscle to move eye laterally.
Result of damage to the edinger westfall nucleus.
What is the lack of ability to constrict pupils or accommodate lens through the oculomotor ANS component?
Enters/exits the skull through the foramen rotundum
What is the maxillary portion of the trigeminal nerve (CN V)?
Fracture of the cranial fossa anteriorly causes this.
Anosmia (loss of smell) from damage to olfactory cranial nerve.
The cranial nerves that are affected by UMNL
Facial and hypoglossal
CN III function/type
Oculomotor. Motor, innervates all the nerves of the eye except the lateral rectus and superior oblique. Autonomic portion controls the ciliary and constriction muscles (shape of lens and size of pupil)
Results of damage to the mesenphalic trigeminal nuclei
What is the nteruption of proprioceptive information from the face through the trigeminal nerve ?
Entry/exit of skull is the internal auditory meatus and the stylomastoid foramen
What is the facial nerve (CN VII)?
Loss of afferent gag reflex
What is damage to Glossopharyngeal CN?
The cranial nerves that influence the eyes
What are the optic, oculomotor, trochlear and abducens
CN V
Trigeminal. Both sensory and motor.
Motor: muscles of chewing and palate elevators.
Sensory:Pain, temp, touch and position from face and scalp (opthalamic portion for upper face, maxillary portion for middle face and mandibular portion for lower)
Result of damage to the spinal trigeminal nucleus.
What is lack of pain and temperature sensation from the face (CN V), loss of sensation from pharynx and tongue (CN IX), loss of sensation from larynx, pharynx, back of ear (CN X).
The cranial nerves that enter/exit in the post-olivary sulcus of the medulla
Glossopharyngeal (IX), Vagus (X)and Accessory (XI)
The effect of an UMNL in CN VII on eyebrow movement
An upper motor neuron lesion in the facial nerve would only effect the control of facial muscles in the contralateral lower face because the upper face muscles are innervated with bilateral UMNs. So there would be little effect on the eyebrows.
The Glossopharyngeal, Vagus, Hypoglossal, accessory and facial nerves are all involved.
What is swallowing?