Head and neck Flashcards
Inner ear: arterial supply
Internal auditory artery
Internal auditory artery branches to form common cochlear and vestibular
Internal auditory usually a branch of basilar artery
Inner ear contents
Tympanic cavity
Bony labyrinth
Membranous labyrinth
Auditory ear
Connects nasopharynx with tympanic cavity
Normally closed, lumen opens when tensor veli palatine contracts
Sensory via glossopharyngeal
Middle ear: arterial supply
Anterior tympanic artery form first part of maxillary
Contributions form ascending pharyngeal, middle meningeal, posterior auricular, artery of pterygoid canal and caroticotympanic branch of internal carotid
Chords tympani
Crosses medial surface of tympanic membrane and handle of the malleus
Leaves tympanic cavity via petrotympanic fissure
Joins lingual nerve
External auditory meatus
2.5cm long
Mainly auriculo-temporal form CNV3 and auricular branches form facial nerve and vagus
Tympanic membrane
8mm in diameter
Chorda tympani across medial surface
Malleus attached to inner surface, lateral; auriculotemporal nerve and auricular branch of vagus. Medial; tympanic branches of glossopharyngeal nerve
External ear- auricle
Elastic cartilage
Muscle of facial expression but vestigial in humans
Lymph to parotid and cervical lymph nodes
Divisions of the ear
External- auricle, external auditory meatus, external surface of tympanic membrane
Middle- internal surface of the tympanic membrane, tympanic cavity, ossicles, pharyngotympanic tube
Internal(inner)- auditory apparatus, vestibular apparatus, internal auditory meatus, vestibulocochlear nerve, oval windows, round windows
Larynx lymph
Superior deep cervical and inferior
Pharynx divisions
Nasopharynx
Oropharynx
Larynopharynx
Teeth nerve supply
Upper teeth- superior alveolar nerve
Lower teeth- dental branches of inferior alveolar nerve
Hard palate- nerves and vessels
Greater and lesser palatine nerves and arteries
Nasopalatine nerve
Maxillary artery
Salivary glands
Submandibular- Facial nerve
Parotid- glossopharyngeal nerve
Sublingual- facial nerve
Blood supply of tongue
Genioglossus- sublingual artery and vein
Hyoglossus- lingual artery and vein
Styloglossus- dorsal lingual arteries ad vein
External nose arterial supply
Anterior and posterior ethmoidal, opthalmic nerve
Sphenopalatine and greater palatine, maxillary nerve
Septal branch- superior labial and lateral nasal, facial nerve
Conchae
Superior conchae- opthalmic and maxillary nerve
Middle conchae- opthalmic and maxillary nerve
Inferior conchae- opthalmic and maxillary nerve
Circle of Willis
Anterior communicating Anterior cerebral Middle cerebral Internal carotid Posterior cerebral Basilar Vertebral arteries from subclavian
Layers of the scalp ‘SCALP’
Skin Connective tissue Aponuerosis Loose Adeola connective tissue Periosteum
lymph of head
-Superficial Parotid Mastoid Occipital Submandibular Submental -deep cervical
Infratemporal fossa
‘Space’ beneath base of the skull
Parotid gland
Salivary glands- serous acini only
Facial nerve separates deep and superficial lobes
Glossopharyngeal nerve
Parotid duct
If tense it can be felt
Facial nerve branches over this TZBMMC
External carotid artery
Terminal branch- maxillary and superficial temporal behind neck of mandible
Posterior branches; occipital
Lymph neck
Deep cervical Superficial cervical Submental Submandibular Parotid Occipital
Vertebral arteries
Branch fo subclavian
Ascending nick in foramen transversarium
Left and right vertebral arteries unite to form basically artery
Basilar artery joint to form part of the circle of Willis to supply the brain
