Transcript Occipital Lobe

Cerebrum
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The LARGEST part of the brain.
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Associated with higher brain function, such
as thought and action.
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The surface of the cerebrum -- the cerebral
cortex -- is composed of six thin layers of
neurons, which sit on top of a large collection
of white matter pathways.
Cerebrum
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Divided into four lobes:
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Frontal
Temporal
Partial
Occipital
Frontal Lobe
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Location: The forward most part of the brain
(Forehead) anterior to the parietal lobe.
Functions
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Important for voluntary movement
Planning,
Parts of speech,
Emotions,
Reasoning
Problem solving.
Most significant lobe for personality and
intelligence (:
What could go wrong?
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Strokes result from frontal lobe damage
Concussions
Alzheimer's Disease
Frontal lobe epilepsy
Temporal Lobe
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Location: Side of head above ears, inferior to
the frontal and parietal lobe.
Split into three gyrus
Functions
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Memory
Hearing
Speech
Behavior
Vision
What could go wrong?
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Difficulty in understanding spoken words (Wernicke's
Aphasia)
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Short-term memory loss.
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Right lobe damage can cause persistent talking
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Increased aggressive behavior
Parietal Lobe
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Location: Posterior to the Frontal Lobe and
Superior to the Temporal Lobe.
2 main sections of the Parietal Lobe
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Postcentral gyrus: makes up primary
somatosensory cortex which is responsible for the
sense of touch
Posterior Parietal cortex : Divides into 4 sections
Posterior Parietal Cortex
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Divides into 4 parts - All aid in the spacial mapping of
an area and distances. Controls eye and hand movement ,
discovered in the 90’s after the study of monkeys.
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LIP Lateral Intraparietal
VIP Ventral Intraparietal
MIP Medial Intraparietal
AIP Anterior Intraparietal
Problems?
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Lesions on the left Parietal Lobe= Gerstmann's
syndrome which causes inability to write, inability to
comprehend mathematics
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Lesions on both hemispheres of the Parietal Lobe,
Balint's syndrome, causes inability to recognize
spacial surroundings, difficult fixating eyes
Occipital Lobe
Location: Posterior portion
of the brain; posterior to the
temporal lobe and inferior to
the parietal lobe.
Function
- Vision
includes: vision perception and color
recognition
Problems Associated With Occipital Lobe
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Occipital Lobe Epilepsy
Defects in vision
Difficulty with locating objects in environment
Difficulty with identifying colors
Visual illusions - inaccurately seeing objects
Word blindness – (dyslexia)
Hermann Munk
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studied the occipital lobe
connected vision with occipital lobe
damage to the occipital lobe causes
blindness.
both eyes connected to left and right
hemisphere of brain.
Fun Facts!
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The cortex is heavily convoluted, so that if you were
to spread it out, it would actually take up about 2 1/2
square feet
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It includes about 10 billion neurons, with about 50
trillion synapse