The Cerebral Hemispheres Flashcards

1
Q

What is the basal ganglia?

A

Collection of neuronal cell bodies buried in the white matter

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2
Q

Where does the corpus callosum sit?

A

Between the cerebral hemispheres

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3
Q

Where in the brain is the primary motor cortex?

A

Area 4 - precentral gyrus

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4
Q

Where is Broca’s area located?

A

Inferior fronta gyrus (area 44,45)

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5
Q

What is the function of the prefrontal cortex?`

A

Cognitive functions of higher order: intellect, judgement, prediction and planning

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6
Q

Where is the primary sensory?

A

Post central gyrus - areas 3,1,2

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7
Q

What is the function of the superior parietal lobe?

A

Interpretation of general sensory information (sensory association and conscious awareness of contralateral half of body

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8
Q

What is the function of the inferior parietal lobe?

A

Interface between somatosensory cortex, visual and auditory association areas. Dominant hemisphere contributes to language functions

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9
Q

Where is the primary auditory cortex found??

A

Superior temporal gyrus - areas 41, 42

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10
Q

Where is the auditory association area (Wernicke’s area) found?

A

Posterior to areas 41, 42 in dominant hemisphere

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11
Q

What is the function of the inferior surface?

A

Receives fibres from the olfactory tract - conscious appreciation of smell

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12
Q

Where is the primary visual cortex located?

A

On either side of the calcarine sulcus in the occipital lobe (Area 17)

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13
Q

Where is the visual association cortex and what is its function?

A

Occipital Lobe (Area 18,19) -interpretation of visual images

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14
Q

What is the function of the limbic system?

A

Memory and emotional aspects of behaviour

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15
Q

Which structures make up the limbic system?

A

Cingulate gyrus, hippocampus, parahippocampal gyrus and amygdala

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16
Q

What is Broca’s area?

A

Motor speech area

17
Q

What is Wernicke’s area?

A

Auditory association area necessary for recognition of speech - found in dominant hemisphere

18
Q

What are the three types of myelinated axon fibres found in the brain?

A

Commisural, association and projection fibres

19
Q

What do commissural fibres do?

A

They connect the corresponding parts of the cerebral hemispheres (corpus callosum)

20
Q

What do association fibres do?

A

Connect one part of the cortex with another

21
Q

What do projection fibres do?

A

They run between the cerebral cortex and subcortical centres (pass through the corona radiata and internal capsule)

22
Q

Where is the internal capsule located?

A

Between the thalamus, caudate nucleus and lentiform nucleus

23
Q

Which artery supplies the internal capsule?

A

Middle cerebral artery

24
Q

What are the basal ganglia?

A

Subcortical nuclei deep within the cerebral hemispheres

25
Q

What are the names of the basal ganglia?

A

Caudate nucleus, lentiform nucleus (putamen + globus pallidus) and substantia nigra

26
Q

What is the function of the caudate nucleus and putamen?

A

They receive input from the motor cortex, premotor cortex and thalamus and are connected to the output regions

27
Q

What is the function of the globus pallidus and substantia nigra?

A

Output regions - globus pallidus projects to the thalamus

28
Q

What is the function of the basal ganglia?

A

Regulation of initiation and termination of movements