01:830:313 Lecture Notes - Lecture 2: Parietal Lobe, Hominidae, Somatization
Document Summary
Brain tissue is involved with controlling movement: dexterity, colored vision, upright posture, language. Great apes follow a slight increase trend of body weight to brain size. Humans showed higher brain size over smaller weight increase. Primary cortical areas of the brain are small. Planning of movement in parietal lobe: putting what we see with what we hear. Neurons in the frontal area fire off regarding hand movements. Wernicke"s patients could not understand language, but could speak. Broca"s patients understood language, but could not speak: both in parietal lobe. 95% of people have language localized in left hemisphere. Corpus callosum: up to 95% people are right handed, pathway that connects left and right hemispheres of the brain, epilepsy starts affecting one hemisphere, then can invade the other hemisphere. Seizures are the high number of neurons firing off in one/both: split-brain: cutting the corpus callosum to prevent epileptic invasion hemispheres. Left hemisphere is left on its own (right hand drawing)
