ANAT 215 Lecture Notes - Lecture 9: Motor Neuron, Retina, Peripheral Vision
18 Aug 2016
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Special senses: the eye/vision (reading material: chapter 18 pages 491-500) Vision is dominant sense, 70% of receptors in body. Eyebrow: prevent stuff from getting in eye. Palpebral fissure: free margin when eye is open. Medial, lateral canthus: eyelids are connected at the inner and outer corner. Caruncle: fleshy projection, containing glands secretions include the crusty stuff in the morning. Levator palpebrae superioris muscle: upper eyelid is more mobile than lower. Orbicularis oculi; when contracting, allows closure of eyes. These two contract reflexively every 3-7 seconds, for blinking. Without, they"d probably stick together in the morning o o o o o: if there is an inflammation, there is a painful localized swelling called a stye. Conjunctiva: : transparent mucus membrane that covers the outer surface of the eye. Protect eye, secretes a mucus that prevents dehydration, o. Palpebrae and ocular: inner surface of eyelids and outer surface of eye. Mucous membrane covered by specialized stratified squamous epithelium.
