Neuroanatomy II Reference: Banich, Ch. 2

The Cerebral Cortex Frontal lobes Parietal lobes Temporal lobes Occipital lobes

The Cerebral Cortex Central sulcus Sylvian (lateral) fissure

Primary Sensory & Motor Areas Primary Visual Cortex Primary Motor Cortex Somatosensory Cortex Frontal Lobe Primary Olfactory Cortex Primary Auditory Cortex Parietal Lobe Temporal Lobe Occipital Lobe

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

1. Primary Motor Cortex Note Crossover:

Motor “map” is disproportionate and inverted: 1. Primary Motor Cortex

Damage: - poor touch discrimination - disturbed sense of body position, size PatientArea of weakness L/R cortex? Region affected? Fredleft leg Maryright side of face right left high low 1. Primary Motor Cortex

2. Somatosensory Cortex Tactile information, pressure, pain, muscle movements Also a crossover Also disproportionate and inverted:

2. Somatosensory Cortex

Damage -> 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". 2. Somatosensory Cortex

3. Primary Visual Cortex Early processing of visual information Also a crossover Also disproportionate (“retinotopic”) and inverted

3. Primary Visual Cortex

ØDamage: ØBlindness in corresponding area of visual space: 3. Primary Visual Cortex Normal view of room

3. Primary Visual Cortex Damage to Right PVC

3. Primary Visual Cortex Damage to lower part of Left PVC

3. Primary Visual Cortex Scotoma (lower right PVC)