Pathologies - Revision - Hannah Flashcards
What is AMNOSIA and what CN would you think of?
Loss of smell - Olfactory Nerve
What can AMNOSIA be caused by?
Fracture of cribiform plate;
Restrictions to ETHMOID and frontal; vomer; sphenoid
Membranous tensions affecting Olfactory nerve fibres
Congestion in nasal cavity blocking receptors and foramina
Name some causes of OPTIC nerve dysfunction?
Cranial bone displacement - sphenoid
Optic nerve compression in OPTIC CANAL and SELLA TURCICA of sphenoid
Membranous tensions
Neuritis - inflammation of optic nerve
Systemic diseases - MS; diabetes; pituitary tumour
What is Strabismus?
Squint
What CNs would you associate with Strabismus?
Oculo-Motor; Trochlea and Aducens
What is Diplopia?
Double Vision
What CNs would you associate with Diplopia?
Oculo-Motor; Trochlea and Abducent
What is Ptosis?
Drooping of upper eye lid.
What causes Ptosis?
Injury to Levator Palpbrae muscle - Oculo-Motor nerve
What is Photophobia?
Persistently dilated pupil on affected side.
How is Photophobia caused?
Injured parasympathetic nerve fibres from Oculo-Motor Nerve
If the Abducent Nerve is injured causing Strabismus, how might the eyes look?
Cross eyed
What is Bells Palsy?
Paralysis of face on affected side - muscles on one side droop and become expressionless, one side is immobile; smile is crooked; tears trickle from affected side, food collects in cheek.
What causes Bell’s Palsy?
Damage to FACIAL nerve.
Other causes - stroke; tumours; surgery; mumps; middle ear infections; head injury, neuritis. Also connects to CN 2,3,4,5,6,8 - movements of eyelids, eyeballs and blinking and ears.
Name 2 conditions related to the Cochlea division of the Vestibulo- Cochea Nerve?
Deafness
Tinnitus
Name 3 conditions related to the Vestibular division of the Vestibulo- Cochea Nerve?
Dizziness
Vertigo
Motion sickness
What causes damage to the Vestibulo-Cochlea NErve?
Infection of inner ear
Menieres disease
Meningitis
Encephalitis
Name 4 conditions related to the Trigeminal Nerve?
1) Middle ear infections / glue ear
2) Hearing disorders
3) Hyperacusis
4) Trigeminal Neuralgia
How are middle ear infections and glue ear related to the Trigeminal Nerve?
Mandibular division of the Trigeminal nerve innervates the Tensor Veli palatini muscle which opens the Eustachian tube which drains the middle ear. Overstimulation of mandibular branch of Trigeminal nerve may involved with recurrent middle ear infections and glue ear.
The Trigeminal mandibular branch and motor branch travel together throughout much of their pathway. The Motor branch supplies the medial pterygoid muscle that also gives off two smaller branches to tensor tympani muscle and tensor veli palatini muscle, which assist with the opening of the Eustachian tube.”
What is Trigeminal Neuralgia?
Most painful condition in medical world.
Recurrent and severe facial pain, electric shock type.
Affects any of the areas supplied by Trigeminal Nerve but maxillary and mandibular divisions are most common.
Attacks can be triggered by slightest stimulus - eating; breeze, brushing teeth.
1 side of face affected.
Causes: not known. Possible damage to Trigeminal nerve along pathway; compression along pathway; latent herpes virus complex lying dormant in nerve fibres.
How would approach treating Trigeminal Neuralgia?
CS Integration - whole person.
Local area - checking tissues; bones; nerves; membranous. Check Trigeminal ganglion. Stress/ overstimulated system.
Quality in system of being rigid; solid; compressive in cranium or face.
CS approach:
Engage - overall quality of system
Explore - Area around Trigeminal Ganglion - free mobility of temporals and sphenoid
Explore - surrounding membranes - remember ganglion is enveloped by membranous sheath so will be continuous with all surrounding membranes so tensions in those membranes will be relevant.
Trace the pathway of affected nerve - through foramina
Identify trauma to face and cranium - though be aware that contact may trigger an episode
Enhance immune system; any other causal factors eg injury, medication, viral.
What is Hyperacusis?
Sensitivity to noise. Loud noises contract the tensor tympani muscle causing ear ache; fullness; fluttering in ear.
What is Otitis Media?
Middle ear infection
What causes Otitis Media?
Infectious organisms passing up nose and throat into middle ear and Eustachian tube.
Why are babies more prone to Otitis Media?
Shorter Eustachian tubes and less developed immune systems.
What is a burst ear drum?
Ruptured tympanic membrane - releases pus as body clears infection. Repairs in few days. Shows inadequate drainage of the Eustachian tube.
What is Otitis Media with effusion?
Glue ear