PSYD33H3 Lecture Notes - Parietal Lobe, Occipital Lobe, Temporal Lobe

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1 Mar 2013

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PSYD33- lec 3
Neuropsychologist looks at especially cognitive and cortical areas of the brain
Cognitive tests are not IQ tests.
It breaks up the tests and tests smaller bits of the brain functioning, often testing the damage occurred n
the brain result of stress, toxins, external damage or internal like strokes
Brain anatomy:
Cortex: outer parto f the bran, two sides of bran. Left hemisphere is more imp in males for lang, thinking
in words, math. Females have better sharing between the two hemispheres
Reading and writing depend on the parietal lobe because they require a spatial analyzer
Homunculus is in the parietal lobe as well as the outer spatial map
One homunculus in both lobes. The right parietal map of external space is superior to the left one.
In the left lobe it encodes only the space to the right of the midline in the body. That is the hemispace
The right parietal lobe has representations for both the right and left side of the lobe.
The knowledge of spatial locations is dependent on which side of space and dependent on which way
you are oriented
The parietal lobe is giving the information from the occipital lobe a shape.
In terms of vision, we can also see motion. In order to recognize an object there is a pathway in the
occipital lobe that comes in through the retina, then it is sent to the temporal lobe to essentially
recognize it as an object or a name. or it goes upto the parietal lobe for thte spatial map. It is the dorsal
stream of the visual system. Motion is perceived through the dorsal stream, the object has to be tracked
across the spatial map
A type of cortical damage that damages the ventral stream which s responsible ofr object recognition
and naming. The motion system is still intact and can perceive the motion but don’t see the object
When the object is in hands, the naming cana be done through tactile ways but not through the visual
Consciousness pulls everything together. It needs these neural events and puts them together and we
have an integrated percept of what we are thinking and reading
Temporal lobe
Emotions is in amygdale on the inside of the lobe
Receptive language is in the wernickes area.
Two ears allow us to localize soundsi n space
Occipital lobe- area 17
Regulated fine motor movements. And balance
With cerebellar movement it has t do with timing
Connected with frontal lobes to help organize behaviour and sequencing responses
Brainstem: survival functions of the body.
Loss of consciousness is damage to the sleep wake cycle in the brain stem
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