BIO 211 Lecture Notes - Lecture 26: Grey Matter, Positron Emission Tomography, Libido
15 Sep 2020
School
Department
Course
Professor
Document Summary
Positron emission tomography (pet)- technique that produces a 3-dimensional image or picture of functional processes in the body: brain metabolism, injection of radio nucleotide tracer. Magnetic resonance imaging (mri: protons (h+) are charged and spin, use of magnet. Cerebral lateralization- right and left cerebral hemispheres are specialized. Left hemisphere (analytical ability: usually dominant, language, analytical ability. Right hemisphere (usually dominant in right handers: visuospatial, patterns, reading maps. Broca"s area- coordinates complex fine-motor functions involved in speech (control of tongue, lips, etc. ) Wernicke"s area- responsible for ability to comprehend language and formulate words. Aphasia- disturbance in comprehension and expression of language. Broca"s aphasia: speech is poorly articulated, understand what is spoken, but have difficulty responding. Wernicke"s aphasia: speak easily, using real and made-up words, cant understand spoken or written language, thus, oral and written language (hearing and vision) must project to wernicke"s area, wernicke"s area projects to broca"s. Functions of sleep- restore the body, heal the body, memory consolidation.
