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H+N Anatomy

Anatomy: Head and Neck

Borders of Scalene Triangle Anterior scalene m, Middle scalene m, 1st Rib
Contents of Scalene triangle trunks of brachial plexus, subclavian artery
Thoracic outlet syndrome affects what part of brachial plexus? Lower trunk (Ulnar n especially)
Besides brachial plexus, what nerves can be compressed in thoracic outlet syn? Symp chain (horners), Recurrent Laryngeal n (hoarseness)
Embryological origins of pharyngeal pouch/groove/arch? pouch: endoderm groove: ectoderm arch: mesoderm + Neural crest
Nerve supplies of Pharyngeal arches 1,2,3,4,6 1: V3 (mandibular) 2: VII (facial) 3: IX (glossopharyngeal) 4,6: X (vagus)
Aortic arch derivatives? 3: int carotids, common carotids 4: arch of aorta (+ rt subclavian) 6: pulm artery + ductus arteriosus
Muscles of pharyngeal arches 1,2,3,4,6? 1:mastication muscles, tensor tympani 2:stapedius, facial expression 3:stylopharyngeus 4:cricothyroid, soft palate, pharynx (except styloph) 6: larynx (except cricoth)
Bones of pharyngeal arches 1,2,3,4,6? 1: Maxilla, Mandible, Incus, Malleus 2: Stapes, lesser horn/upper body of hyoid 3: lower body/greater horn of hyoid 4: thyroid cartilage 6: all other laryngeal cartilage
Pharyngeal groove derivatives? Only groove 1-->external meatus
Pharyngeal pouch derivatives? 1,2,3,4 1: auditory tube + mid ear cavity 2: palatine tonsil epith 3: (goes down) Inf P.Thyroid, Thymus 4: Sup P.Thyroid, Ultimobranchial body (C-cells)
Contents of Sup Orbital Fissure III, IV, VI, V1 (ophthalmic N), Ophthalmic V
Foramen spinosum contents Middle meningeal artery (epidural hematoma)
Jugular foramen contents? XI, X, XI
Stylomastoid foramen contents? VII (Bell's palsy)
Carotid canal contents? Int Car Artery, sympathetic nerves (Horner's)
Created by: jsad



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