Module 6 Flashcards
(41 cards)
what is the function of older brain networks
older brain networks sustain basic life functions and enable memory, emotions, and basic drives
what is the function of newer neural networks
newer neural networks within the cerebrum - the two cerebral hemispheres contributing 85% of the brain’s weight, they form specialized work teams that enable our perceiving, thinking, and speaking
what covers the two hemispheres of the cerebrum
the cerebral cortex
what is the function of the cerebral cortex
the cerebral cortex is a relative newcomer, it is your brains thinking crown, your bodies ultimate control and information processing center
what distinctively makes us human
the complex functions of our cerebral cortex
what are the brains left and right hemispheres filled with
the brains left and right hemispheres are filled mainly with axons from nerves, connecting the cortex to the brains other regions
how many nerve cells and synaptic connections does the cerebral cortex contain
some of the 20 to 23 billion nerve cells in the brain and 300 trillion synaptic connections
how is each hemisphere’s cortex subdivided
they are each subdivided into four lobes, seperated by prominent fissures or folds
where is the frontal lobe located
behind your forehead
where are the parietal lobe located
at the top and to the rear of your head
where are the occipital lobes located
at the back of your head
where are the temporal lobes located
just above your ears
what are the four lobes of the hemispheres
- frontal lobes
- parietal lobes
- occipital lobes
- temporal lobes
what are the frontal lobes involved in
involved in speaking and muscle movements and in making plans and judgements
what is the function of the parietal lobes
the parietal lobes receive sensory input for touch and body position
what do the occipital lobes include
the occipital lobes include the areas that receive information from the visual fields
what do the temporal lobes include
the temporal lobes include the auditory areas, each receiving information primarily from the opposite ears
who discovered the motor cortex
German physicians Gustav Fritsch and Eduard Hitzig
when was the motor cortex discovered
1870
does the brain have sensory receptors
the brain has no sensory receptors
who was able to map the motor cortex
Otfrid Foerster and Wilder Penfield were able to map the motor cortex
how did Foerster and Penfield map the motor cortex
they stimulated different cortical areas and observed responses in hundreds of wide awake patients
what did Foerster and Penfield discover
they discovered that body areas requiring precise control, such as fingers and mouth, occupy the greatest amount of cortical space
what else did Penfield identify
he identified another cortical area at the front of the parietal lobes, it was parallel to and just behind the motor cortex - called the somatosensory cortex
