Neuroanatomy II

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Neuroanatomy II
Reference Banich, Ch. 2
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The Cerebral Cortex
Parietal lobes
Frontal lobes
Occipital lobes
Temporal lobes
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The Cerebral Cortex
Central sulcus
Sylvian (lateral) fissure
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Primary Sensory Motor Areas
Primary Motor Cortex
Somatosensory Cortex
Frontal Lobe
Parietal Lobe
Primary Visual Cortex
Primary Olfactory Cortex
Occipital Lobe
Primary Auditory Cortex
Temporal Lobe
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Primary Sensory Motor Areas

1. Primary Motor Cortex
2. Somatosensory Cortex
3. Primary Visual Cortex
4. (Primary Auditory Cortex)
5. (Primary Olfactory Cortex)

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1. Primary Motor Cortex
Note Crossover
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Motor map is disproportionate and inverted
1. Primary Motor Cortex

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1. Primary Motor Cortex

• Damage
• - poor touch discrimination
• - disturbed sense of body position, size

Patient Area of weakness L/R cortex? Region affected?
Fred left leg
Mary right side of face
right
high
left
low
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2. Somatosensory Cortex

• Tactile information, pressure, pain, muscle
• movements
• Also a crossover
• Also disproportionate and inverted

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2. Somatosensory Cortex
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2. Somatosensory Cortex

• Damage -gt poor touch discrimination, disturbed
  sense of body position, size.
• Mrs. K complained that her hand felt "enormous,
  out of
• proportion with the rest of my body. It feels
  like I was
• wearing a huge, thick baseball glove. Sometimes
  it
• seems to me as though my hand is hot and cold at
  the
• same time".

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3. Primary Visual Cortex

• Early processing of visual information
• Also a crossover
• Also disproportionate (retinotopic) and
  inverted

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3. Primary Visual Cortex
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3. Primary Visual Cortex

• Damage
• Blindness in corresponding area of visual space

Normal view of room
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3. Primary Visual Cortex
Damage to Right PVC
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3. Primary Visual Cortex
Damage to lower part of Left PVC
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3. Primary Visual Cortex
Scotoma (lower right PVC)