SCRN Study Guide: Anatomy And Physiology with 65 Verified Questions and Answers Graded A+.

SCRN Study Guide: Anatomy And Physiology with 65 Verified Questions and Answers Graded A+. What percentage of the body's oxygen supply and cardiac output does the brain use? The brain uses 20% of the body's oxygen suppy and 15% of the body's cardiac output. *brain cells do not store oxygen or glucose. The need a constant suppy of micronutrients from arterial blood. What is the normal blood flow to cerebral tissue? When does electrical failure occur? Normal blood flow to the brain is 50-55ml/100/min electrical failure occurs at 15-20ml/100/min temporal lobe hearing, memory, learning, wernicke (receptive aphasia), visual and auditory memories, behavioral elements frontal lobe personality, affect, tact, inhibition, judgement, planning, motor strip body parts, frontal eye fields- conjugate eye movements; pupil changes, extra pyramidal motor control, motor speecharticulation, speed, and rhythm of speech, creative thought,abstract thinking parietal lobe pain, temperature, light, touch, vibration, two point discrimination, visual function, language, reading, internal stimuli, tactile sensation, and sensory comprehension occipital lobe infarcts macular vision, broca's area (expressive aphasia), facial neurons Cerebellum The cerebellum first receives information about an intended movement then it sends information back to the motor cortex about the required direction, force, and duration of the movement. It acts like an air traffic controller. The cerebellum can't initiate movement but is responsible for unconscious coordination of movement. can cause lack of coordination, clumsiness, shaking/tremors * It is important to diagnose cerebellum infarcts early because swelling may cause brain stem compression or hydrocephalous SCRN Study Guide: Anatomy And Physiology with 65 Verified Questions and Answers Graded A+. Cerebrum grey matter: cognition and personality deficits white matter (deep): regions of the brain cannot communicate with each other What causes brain stem infarcts? usually related to basilar occlusion. This type of infarct is serious or fatal. Survivors may be left in a vegatative state What is the main cause of cell death? hypoxia or anoxia What factors influence the rate and extent of penumbral tissue and infarcted tissue 1: rate of onset 2: Duration of ischemia 3: Degree of collateral circulation perfusing the infarcted zone 4: functionality of systemic circulation 5: hematologic factors 6: metabolic factors .