broadmann areas

Question 1

where is broadmann #4 located?

Answer 1

precentral gyrus of frontal lobe

Question 2

which area is the only place for Betz cells?

Answer 2

Broadmann #4

Question 3

what is the function of broadmann area #4?

Answer 3

voluntary motor initiation- distal extremities and facial and oral muscles

Question 4

where are Broadmann 1-3 located?

Answer 4

post central gyrus of parietal lobe

Question 5

what are areas 1-3 best known for?

Answer 5

somesthetic-body sensing

Question 6

what are the functions of B 1-3?

Answer 6

pain, thermal, deep touch, light touch, vibratory and kinesthetic input received and integrated into conscious sensation

Question 7

what lamina are best developed in areas 1-3?

Answer 7

lamina IV, V and VI which contributes to voluntary motor initiation pathways

Question 8

where are broadmann 6 and 8 located?

Answer 8

in front of area 4- called “premotor” regions

Question 9

6 and 8 both do what?

Answer 9

motor initiation centers directly and indirectly to pyramidal system

Question 10

what is 6 known best for?

Answer 10

influence on proximal portions of extremities

Question 11

what does area 8 do?

Answer 11

voluntary movements of the eyes, LMN that move 6 ocu muscles CN III IV and VI

Question 12

where are Broadmann 9-12 located?

Answer 12

anterior and rostral frontal lobe- newest neopallial structures

Question 13

what lamina are associated with Broadmann 9-12

Answer 13

lamina II and III- highly developed associative input arrives from all cortical regions

Question 14

what occurs in areas 9-12

Answer 14

greatest elaboration of thought including abstract reasoning and imaginative and emotional uniqueness

Question 15

where is Broadmann 44 located?

Answer 15

frontal operculum along lat inf frontal lobe

Question 16

what happens in Broadmann 44?

Answer 16

speech- Broca’s speech area-association afferent fibers come in and directs area #4 for speaking, writing and signing

Question 17

where are Broadmann 17-19 located?

Answer 17

occipital lobes- collectively visual cortex

Question 18

Broadmann 18 and 19 surround 17 and do what?

Answer 18

integrating and memory storage for visual sensations

Question 19

damage to Broadmann 17-19 would do what?

Answer 19

not lead to blindness but would affect correlating images with past experiences

Question 20

where is Broadmann 17 located?

Answer 20

calcarine sulcus

Question 21

what does area 17 do?

Answer 21

primary visual cortex- where we “see” motion, illumination and transparency- striate cortex because of white band through lamina IV

Question 22

where is Broadmann 41 located?

Answer 22

primary auditory cortex- superior temporal gyrus along medial extension known as Heschl’s gyrus

Question 23

Broadmann 41 does what?

Answer 23

primary auditory cortex- we “hear” pitch tone loudness etc

Question 24

Wernicke’s area 22 is located where?

Answer 24

surrounds 41 and extends almost to parietal lobe

Question 25

what does Wernicke’s area 22 do?

Answer 25

hearing memory fx, bring together formation of written word- utilizes parietal (5, 7, 39, 40) and occipital (17-19)

Question 26

where are Broadmann 5, 7, 39, 40 located?

Answer 26

sandwiched between somesthetic, auditory and visual receptive regions, fill parietal

Question 27

what is the function of areas 5, 7, 39, 40?

Answer 27

synthesize memory and creative function such as reading, writing and language

Question 28

what would a lesion in area 39 lead to?

Answer 28

alexia and agraphia- reading and writing problems

Question 29

what is a connection between Wernicke’s and Broca’s area?

Answer 29

arcuate fasciculus- important for communication and using tools

Question 30

what is thought to be the gustatory area?

Answer 30

Broadmann #43

Question 31

what sense is associated with memories better than any other sense?

Answer 31

smell- stem cells in nose constantly being replaced, neurons!

Question 32

where does interpretation of smell happen?

Answer 32

34- uncus #28- parahippacampal gyrus of temporal lobe