APY 345 Lecture Notes - Lecture 12: Orbicularis Oculi Muscle, Platysma Muscle, Night Monkey
10 May 2016
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Decreased: smell, prognathism, nasal concha, receptors. What"s in your mouth, you can smell: rhinarium: Humans: 1 maxillary, 2 ethmoidal, reduced complexity. 1 maxillary: cranial nerve viii (8): vestibulocochlear n. hearing, (ecto)tympanic ring: Holds the tympanic membrane: tympanic membrane: very superficial in owm, tympanic plate: behind head of mandible, auditory bulla: Depth perception: macula lutea: all primates have a retina, but only higher primates have this. Middle of it is a fovea, area is greatest visual activity one cell deep. If no cones, nocturnal: fovea centralis, optic chiasm: cross of optic n. (cnii, scotopic vision. Color vision: most nwm, owm, apes & humans, rods: 120 million, cones: 7 million, sphincter colli m. : Muscles of facial expression derived from sphincter colli m: convey emotion, aid in volcallization/pronunciation, form sphincters/dilators aid in mastication, innervation of the face. Mammalian traits: eyelashes, rods predominate, visual cortex.
