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Diagnostic Imaging > Cerebral Hemisphere Overview > Flashcards

Cerebral Hemisphere Overview Flashcards

1
Q

What is a gyri?

A

Complex convolutions of brain cortex

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2
Q

What is a sulci (fissure)?

A

CSF-filled grooves or clefts that separate gyri

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3
Q

What is an operculae?

A

Parts of frontal, temporal, pareital lobes that overhang/enclose insula

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4
Q

It is anterior region of hemisphere; anterior to central sulcus, superior to sylvian fissure

A

Frontal lobe

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5
Q

Posterior region of the hemisphere; posterior to central sulcus, anterior to parietooccipital sulcus

A

Parietal lobe

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6
Q

Posterior to parietooccipital sulcus

A

Occipital lobe

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7
Q

Inferior to sylvian fissure, anterior to angular gyrus

A

Temporal lobe

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8
Q

Cortical region hidden within depths of lateral (sylvian) fissure; covered by frontal, temporal, parietal opercula

A

Insula

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9
Q

Contains primary motor cortex

A

Precentral gyrus

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10
Q

It contains the detailed topographyically-organized map (“moto homunculus “) of contralateral body

Head/face lateral, legs/feet along medial surface

A

Primary motor complex

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11
Q

It is within the gyrus just anterior to precentral gyrus (motor cortex)

A

Premotor cortex

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12
Q

What are the three additional major gyri of the frontal lobe?

A
  1. Superior frontal gyrus
  2. Middle frontal gyrus
  3. Inferior frontal gyrus

Which are separated by superior and inferior frontal sulci.

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13
Q

The parietal lobe is seperated by the occipital lobe by what sulcus?

A

Parietooccipital sulcus (medial surface)

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14
Q

It is the primary somatosensory cortex

A

Postcentral gyrus

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15
Q

Superior and inferior parietal lobules lies posterior to what gyrus?

A

Postcentral gyrus

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16
Q

Supramarginal gyrus lies at the end of what fissure?

A

Sylvian fissure

17
Q

Angular gyus lies ventral to what gyrus?

A

Supramarginal gyrus

18
Q

What is the medial surface of the parietal lobe?

A

Precuneus

19
Q

Where is the primary visual cortex?

A

Medial occipital lobe

20
Q

Medial surface of occipital lobe?

A

Cuneus

21
Q

It contains the primary auditory cortex

A

Superior temporal gyrus

22
Q

Part of the temporal lobe which connects with auditory, somatosensory, and visual association pathways

A

Middle temporal gyrus

23
Q

Part of temporal lob: Higher visual association area

A

Inferior temporal gyrus

24
Q

Part of the temporal lobe which is included in the major subdivision of limbic system

A

Parahippocampal gyruss on medial surface, merges into uncus

25
Q

It lies deep in floor of sylvian fissure, overlapped by frontal, temporal, and parietal operculae

A

Insula

26
Q

Parts of the limbic system

A
  1. Subcallosal, cingulate, parahippocampal gyri
  2. Cingulate gyrus extends around corpus callosum; tapers rostrally (anteriorly) into paraterminal gyrus, subcallosal area.
  3. Hippocampus included dentate gyrus, Ammon horn (cornu ammonis)
27
Q

Base of the brain

A

Orbital gyri cover base of frontal lobe: gyrus recus medially

Olfactory bulb/tract lie within olfactory sulcus

28
Q

Three major types of fibers in white matter tracts

A

Cingulum

Corpus callosum

Internal capsule

29
Q

It is a long association fiber which lies beneath the cingulate gyrus

A

Cingulum

30
Q

Largest commisural fiber that links the cerebral hemispheres

A

Corpus callosum

31
Q

Parts of the basal ganglia

A

Caudate nucleus, putamen, globus pallidus

32
Q

Paired nuclear complexes which serve as relay station for most sensory pathways

A

Thalamus

33
Q

Imaging modality which best evaluates the cerebral hemispheres.

A

Multiplanar MR

34
Q

White matter is best evaluated by what imaging?

A

Diffusion tensor imaging (DTI) on 1.5 or 3 Tesla MR

35
Q

Limbic system is best evaluated by what imaging?

A

High-resolution coronal T2 MR, T1 volume images and FLAIR

36
Q

Basal ganglia and thalami are best evaluated by?

A

Multiplanar MR

Diagnostic Imaging (4 decks)

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