SCRN study guide: anatomy and
physiology-Questions and Answers
What percentage of the body's oxygen supply and cardiac output does the brain use?
... [Show More] -
Answer- 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? -
Answer- Normal blood flow to the brain is 50-55ml/100/min
electrical failure occurs at 15-20ml/100/min
temporal lobe - Answer- hearing, memory, learning, wernicke (receptive aphasia), visual
and auditory memories, behavioral elements
frontal lobe - Answer- personality, affect, tact, inhibition, judgement, planning, motor
strip body parts, frontal eye fields- conjugate eye movements; pupil changes, extra
pyramidal motor control, motor speech-articulation, speed, and rhythm of speech,
creative thought,abstract thinking
parietal lobe - Answer- pain, temperature, light, touch, vibration, two point
discrimination, visual function, language, reading, internal stimuli, tactile sensation, and
sensory comprehension
occipital lobe infarcts - Answer- macular vision, broca's area (expressive aphasia), facial
neurons
Cerebellum - Answer- 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
Cerebrum - Answer- grey matter: cognition and personality deficits
white matter (deep): regions of the brain cannot communicate with each other
What causes brain stem infarcts? - Answer- 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? - Answer- hypoxia or anoxia [Show Less]