neuro exam 2
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the cerebrum consists of ________ roughly, equal halves of the brain
2 cerebral hemispheres
cortex refers to the
outer surface of the brain
the cortex has two basic cell types
pyramidal cells and nonpyramidal cells
pyramidal cells are involved in
motor function (project to more distant regions)
nonpyramidal cells are involved in
sensory function (connect to more local regions.
there are ___ layers of cerebrum
6
the outermost layer of the cerebrum is made up of _____ cells and _____
glial cells and axons
the 2nd and 3rd layer of the cerebrum are ____cells
pyramidal cells
the fourth layer of the cerebrum is made up of ____ cells
nonpyramidal cells
the fifth layer of the cerebrum is made up of____cells
pyramidal cells
landmarks of the cerebrum are
cerebral longitudinal fissure, the gyrys and the sulcus as well as the lateral suclus and central sulcus.
the cerebral longitudinal fissure
seperates left and right cerebral hemispheres
the gyrus
is a ridge on the cerebral cortex
the sulcus
is infolding valleys that separate gyri.
if the groove of sulcis is deeper or more pronounced it is termed a
fissure
the cerebrum is divided into __ lobes
5
the 5 lobes of the cerebrum are
frontal, parietal, occipital, temporal, insular
the lateral sulcus (the sylvian fissure)
dividess temporal from frontal and anterior parietal
the central sulcus (aka the rolandic sulcus)
separates frontal and parital entirely
frontal lobe functions and characteristics
the largest of the lobes, predominates in planning, initiation, inhibition of voluntary motion as well as cognitive function
key areas of the frontal lobe
broca’s area and the motor strip
brocas area function
speech motor planningi n dominant hemisphere
motor strip (aka pre-central gyrys) is the site of
initiation of voluntary motor movement
parietal lobe
integrates info related to vision, audition and somatic sense