Neuroanatomy Quiz 7

What happens as you move from 3 → 1 → 2 in the S1?

Characteristics change from primary somatosensory cortex to the beginnings of somatosensory association cortex

Which nuclei do somatosensory information relay through?

VPL and VPM

Where is S1 located?

Postcentral gyrus

What is another name for optic radiations?

Geniculocalcarine fibers

Where do geniculocalcarine fibers start and end? (Both region and visual field)

LGN → calcarine sulcus

Inferior visual field in upper bank

Superior visual field in lower bank

Macula most posterior

Damage to what area causes superior visual field deficit?

Temporal lobe

Where are retinotopic maps found outside of the calcarine sulcus?

Extrastriate cortex

Which areas make up the extrastriate cortex?

18 and 19

The visual ventral stream processes what and where?

“What pathway” Parvocellular layers LGN

The visual dorsal stream processes what and where?

“Where pathway” Magnocellular layer LGN

What is the inability to recognize colors?

Achromatopsia

What areas are implicated in achromatopsia and prosopagnosia?

Lingual and occipitotemporal gyri, including extrastriate areas

What is the function of multimodal areas on the intraparietal sulcus?

Factoring of motivation, attention, and relevance of different objects

Lesions to the right parietal lobe result in what?

Contralateral neglect

Lesions to the left parietal lobe result in what?

Apraxias

Which hemisphere is language heavily localized?

Left

Which regions are heavily connected with the dorsolateral prefrontal cortex?

Parietal multimodal cortex and somatosensory, visual, and auditory association areas.

Which regions are heavily connected with the ventromedial prefrontal cortex?

limbic structures, amygdala

How do Alzheimer’s and cancer show up on a PET scan?

Bright red due to increased uptake of radioactive labeled molecules