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H+N Anatomy
Anatomy: Head and Neck
Question | Answer |
---|---|
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) |