Cranial Nerves Flashcards
Describe the clinical features of an oculomotor nerve palsy
- Ptosis,
- Vertical diplopia,
- Eye turned down and out,
- Fixed and dilated pupil.
Associated with aneurysm so needs urgent brain imaging and angiogram.
Describe the clinical features of a trochlear nerve palsy
- Downwards gaze,
- Oblique diplopia,
- Head tilt away from side of lesion.
Describe features of an abducens nerve palsy
- Defective abduction of the eye,
- Horizontal diplopia
Lesion of the trigeminal nerve may present with?
- Trigeminal neuralgia,
- Loss of corneal reflex,
- Loss of facial sensation,
- Paralysis of muscles of mastication,
- Deviation of jaw to weak side
Lesions of the facial nerve may cause?
- Flaccid paralysis of upper and lower face.
- Loss of corneal reflex,
- Loss of taste,
- Hyperacusis
Lesions of the Vestibulocochlear nerve may cause?
- Hearing loss,
- Vertigo,
- Nystagmus
Lesions of the Glossopharyngeal nerve may cause?
- Loss of gag reflex
Lesions of the vagus nerve may cause?
- Uvula deviation,
- Loss of gag reflex
Lesions of the Accessory nerve may result in?
Weakness turning the head.
Lesions of the hypoglossal nerve may result in?
Tounge weakness and deviation.
What are the afferent and effect limbs of the pupillary light reflex
Afferent - Optic nerve,
Efferent - Oculomotor nerve.
What are the afferent and effect limbs of the corneal reflex?
Afferent - ophthalmic nerve,
Efferent - Facial nerve
What are the afferent and effect limbs of the Jaw jerk
Both afferent and efferent limbs are mandibular
What are the afferent and effect limbs of the gag reflex
Afferent - Glossopharyngeal,
Efferent - Vagus
