2.1 The Brain Part 2 Flashcards
What is the main function of the CSF?
cushions the brain by allowing it to float
What is the blood-brain barrier?
diffusion barrier that prevents most particles from entering the CNS; keeps the brain and spinal cord separate from general blood circulation
What cells form the blood brain barrier?
astrocytes
Why is it important to maintain the blood brain barrier?
maintain a stable chemical environment for the nervous system
What is the foremost part of the brain?
cerebrum
What is the largest part of the brain?
cerebrum
What are the two sections of the cerebrum?
left and right cerebral hemispheres
What separates the left and right cerebral hemispheres from one another?
median longitudinal fissure
What side of the body does the left cerebral hemisphere control?
right side
What side of the body does the right cerebral hemisphere control?
left side
What are gyri?
raised ridges of tissue in the cerebral cortex
What are sulci?
the shallow grooves in the cerebral cortex
What are fissures in the cerebrum?
deep grooves that separate large regions of the brain
What separates the cerebrum from the cerebellum?
transverse fissure
What is the corpus callosum?
bridge of white nerves that connect the cerebral hemispheres together
What color is the cerebral cortex?
gray
What are the four surface lobes of the cerebrum?
frontal
parietal
temporal
occipital
What is the function of the frontal lobe?
controls higher level executive functions such as reasoning and decision making
controls motor functions
permits control over voluntary muscle actions
What is the function of the parietal lobe?
receives sensory information from receptors in the mouth for taste as well as sensory receptors in the skin such as touch, pressure, and pain
What is the function of the occipital lobe?
interprets visual input
