Unit VII Brodmann Areas Location and Function (Final Exam)
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50 Terms
Where is BM 4 located?
Precentral gyrus of frontal lobe
Which BM has the highest contribution to the pyramidal system?
4
What is BM 4 responsible for?
Voluntary motor initiation of distal extremities, facial, and oral
What is the only BM with Betz cells? Which lamina?
4; 5
Which lamina are highly developed in BM 4?
5 and 6 (projection)
Where are BM 1, 2, and 3 located?
Post central gyrus of parietal lobe
What are BM 1, 2, and 3 responsible for?
Somesthetic sensing
Where do BM 1, 2, and 3 receive input from?
Thalamus via spinothalamic, gracilis, cuneatus, and trigeminothalamic (VPL/VPM)
Which lamina are well developed in BM 1, 2, and 3?
4, 5, 6
Where are BM 5, 7, 39, and 40 found?
Parietal lobe
What are BM 5, 7, 39, and 40 responsible for?
Reading, writing, language
Where is BM 39 located specifically?
Angular gyrus
What would a lesion to the angular gyrus (BM 39) lead to?
Alexia and agraphia
Which BM is the "primary visual cortex"?
17
Where is BM 17 located?
Along calcarine sulcus of occipital lobe
Where does BM 17 receive input from?
Lateral geniculate body
What can BM 17 sometimes be referred to as? Why?
Striate cortex; band of white running through lamina 4
What would a lesion to BM 17 lead to?
Blindness
Where are BM 17, 18, and 19 located collectively?
Occipital lobe
What are BM 18 and 19 responsible for?
Visual enhancement and visual memory
What would a lesion to BM 18 and 19 lead to?
Prosapagnosia (face blindness)
Where is BM 43 located?
Parietal operculum
What is BM 43 responsible for?
Taste
Which lamina is well developed in BM 43?
4
Where is BM 22 found?
Superior temporal gyrus
What is another name for BM 22?
Wernicke's area
What is BM 22 responsible for?
Hearing memory, formation of written word
Where does BM 22 receive input from?
BM 5, 7, 39, 40 (parietal) and BM 17, 18, 19 (occipital)
What would a lesion of Wernicke's area lead to?
Dysphagia (nonsense)
Which BM is the "primary auditory cortex'"?
41
Where is BM 41 located?
Heschl's gyrus in transverse temporal gyrus
In which BM do we hear pitch, tone, and volume?
41
Where does BM 41 receive input from?
Medial geniculate body
Where is BM 44 located?
Frontal operculum
What is another name for BM 44?
Broca's speech area
What the blood supply of Broca's speech area?
Middle cerebral artery
What is BM 44 responsible for?
Motor component of speech
What would a lesion of BM 44 lead to?
Motor aphasia (can't spit it out)
Where are BM 9, 10, 11, and 12 located?
Prefrontal area
What are BM 9, 10, 11, and 12 responsible for?
Imagination, emotional uniqueness, abstract thinking
Which lamina are well developed in BM 9, 10, 11, and 12?
2 and 3 (associative)
Which BM would a prefrontal lobotomy impact?
9, 10, 11, 12
What structure connects Broca's to Wernicke's?
Arcuate fasciculus
What is the arcuate fasciculus responsible for?
Communication and tool use
What are BM 6 and 8 collectively known as?
Premotor region
What is BM 6 responsible for?
Voluntary motor initiation of proximal extremities
What is BM 8 responsible for?
Voluntary movement of the 6 extraocular eye muscles
Where is BM 34 located?
Uncus
Where is BM 28 located?
Parahippacampal gyrus of temporal lobe
What are BM 34 and 28 responsible for?
Interpretation of olfaction