ANAT 3010 Lecture Notes - Lecture 20: Palpebral Fissure, Supraorbital Ridge, Lacrimal Sac
19 Mar 2020
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Anat 3010 lecture 20 march 6, 2020 special senses i: vision. The eye and vision: vision the dominant sense in humans, 70% of all sensory receptors are in the eyes, 40% of the cerebral cortex is involved in processing visual information. Eyebrows coarse hairs on the superciliary arches (brow ridges of the skull) Eyelids (palpebrae) separated by the palpebral fissure: meet at the medial and lateral angles (canthi) Lacrimal caruncle reddish elevation at the medial canthus glands here produce the gritty deposits - the eye sand : tarsal plates connective tissue within the eyelids, tarsal glands modified sebaceous glands. Follicles of these hairs are richly innervated by nerve endings. Slightest pressure on the eyelashes will trigger reflexive blinking. The eyebrows shade the eyes from direct sunlight and protects dirt and sweats from entering the eye. Eyelids are also called palpebrae, which are comprised of a superior and inferior one.
