BIOL 2P95 Lecture Notes - Sigmoid Sinus, Tongue, Muscular Layer

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Basicranium: bones, occipital, temporals, sphenoid, vomer, palatines, & maxillae, also parts of parietals and zygomatics are visible, foramina & structures passing through them, incisive foramen nasopalatine n. , sphenopalatine a, palatine foramina greater/lesser palatine nn. Foramen magnum spinal cord, vertebral aa. , spinal accessory nn: hypoglossal canal (foramen) cn xii xi. From sigmoid sinus; meningeal br. of occipital a. ; holes are variable xii. Mastoid foramina emissary v. from sigmoid sinus; holes are variable: other structures, choane mark boundary between nasal cavity and nasopharynx, medial/lateral pterygoid plates of sphenoid insertion for pterygoid mm. &pterygoid hamulus to median raphe and pharyngeal tubercle: middle constrictor from hyoid bone & inf. end of stylohyoid lig. Innervation: pharyngeal plexus supplies most innervation to pharynx; composed of. Nasal cavity & paranasal sinuses: function, transmit, warm, filter, & humidify air, olfaction via cn i, resonating chambers nose and paranasal sinuses affect voice sound, sensory cn v1+2 (mucosa, parasympathetic cn vii (mucosal secretions via paranasal sinuses & voice.

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