ANT 200 Lecture Notes - Lecture 13: Joint Attention, Middle Ear, Human Brain
Document Summary
Iiia: sensing and moving: interacting with the terrestrial habitat. Nerve sensations give you information about position of the head. Human brain: 50% larger than homoerectus brain: individuals more sensitive to slight changes in the head. Middle ear: direct to auditory nerve: bigger than what we see in gorilla. Range of hearing: slightly greater than that of a gorilla. Our conversational speech frequencies are higher than what bonobos use. Main reason: lower frequencies: longer wavelengths not as distorted. Outer and middle ears amplify sound waves in air/water. Natural selection favors different genes on different chromosomes in different lineages. For this function: we are better than our closest living relative. That information comes from both ears on both sides. Neocortical connections result in stimulation of same areas of different sensory stimuli. Reading a textural metaphor/looking at an object/visually perceiving aspects of surface and texture. Get information about surroundings v. actually reaching out and feeling it for yourself.
