Nose/Ear/Mastication Flashcards
Sinusitis
Inflammation of 1+ paranasal sinus
Anosmia
Loss of smell due to shearing of olfactory nerves
Epstaxis
Nosebleed
Kiesselback’s area is frequent site
Nose Arteries
Anterior ethmoid
Sphenopalatine
Greater palatine
Superior labial arteries
Paranasal Sinuses
Frontal
Ethmoidal
Maxillary
Sphenoidal
Frontal & Maxillary Referred Pain
Tapping on bone superficial to sinus will cause pain
Sphenoid Referred Pain
Pain to the top of head
Ethmoid Referred Pain
Pain lateral to eyes
External Ear
Pinna
Ear canal
Tympanic membrane
Middle Ear
Ossicles (MIS)
Eustachian tube (transmits vibration in air to fluid)
Tensor tympani (CN V3)
Stapedius (CN VII - limits transfer of energy during loud sounds)
Inner Ear
Vestibulocochlear organs interpret vibrations as nerve impulses & sends to brain
Bruised Ear (Cauliflower)
Hematoma between cartilage & perichondrium (cartilage will die and reduce size causing deformity)
Ear Drum/Tympanic Membrane
Cone-shaped to capture sound
Myringotomy
Incisions in eardrum for tubes through membrane
Cholesteatoma
Excess invagination of tympanic membrane leading to benign accumulation of dead squamous cells trapped in middle ear
Destroy middle ear by compression
Eustachian Tube
Equilibrates pressure of closed middle ear w/ pressure in nasal pharynx during swallowing/yawning
Otosclerosis
New bone around stapes that leads to loss of vibration and progressive deafness
Acoustic Neuroma
Benign Schwann cell tumor of cell myelinating CN VIII
Acoustic Neuroma Signs
Unilateral hearing loss/tinnitus
Loss of balance/dizziness
Muscles of Mastication
Temporalis
Masseter
Medial and Lateral Pterygoid
TMJ
Mandible, temporal bone and fibrocartilaginous articular disc make up hinge and gliding joint for open, closing, protrusion, retraction and lateral rotation
Dislocated Jaw
Head of mandible slides too far anteriorly and locks jaw open
Dislocated Jaw MOI
Mouth open too wide
Bumped when open
Over contraction of lateral pterygoid
Chorda Tympani
Branch of CN VII
Joins lingual nerve to provide sensory for taste to anterior 2/3 tongue
Submandibular and Sublingual Glands
Salivary
Innervated by CN VII
Motor Nerve Supply to Tongue
CN XII, except palatoglossus (CN X)
Sensory (anterior 2/3)
Lingual (CN V3)
Off mandibular of trigeminal
Taste (anterior)
CN VII via chorda tympani
Sensory and taste (posterior 1/3)
CN IX