broadmann areas Flashcards
where is broadmann #4 located?
precentral gyrus of frontal lobe
which area is the only place for Betz cells?
Broadmann #4
what is the function of broadmann area #4?
voluntary motor initiation- distal extremities and facial and oral muscles
where are Broadmann 1-3 located?
post central gyrus of parietal lobe
what are areas 1-3 best known for?
somesthetic-body sensing
what are the functions of B 1-3?
pain, thermal, deep touch, light touch, vibratory and kinesthetic input received and integrated into conscious sensation
what lamina are best developed in areas 1-3?
lamina IV, V and VI which contributes to voluntary motor initiation pathways
where are broadmann 6 and 8 located?
in front of area 4- called “premotor” regions
6 and 8 both do what?
motor initiation centers directly and indirectly to pyramidal system
what is 6 known best for?
influence on proximal portions of extremities
what does area 8 do?
voluntary movements of the eyes, LMN that move 6 ocu muscles CN III IV and VI
where are Broadmann 9-12 located?
anterior and rostral frontal lobe- newest neopallial structures
what lamina are associated with Broadmann 9-12
lamina II and III- highly developed associative input arrives from all cortical regions
what occurs in areas 9-12
greatest elaboration of thought including abstract reasoning and imaginative and emotional uniqueness
where is Broadmann 44 located?
frontal operculum along lat inf frontal lobe
what happens in Broadmann 44?
speech- Broca’s speech area-association afferent fibers come in and directs area #4 for speaking, writing and signing
where are Broadmann 17-19 located?
occipital lobes- collectively visual cortex
Broadmann 18 and 19 surround 17 and do what?
integrating and memory storage for visual sensations
damage to Broadmann 17-19 would do what?
not lead to blindness but would affect correlating images with past experiences
where is Broadmann 17 located?
calcarine sulcus
what does area 17 do?
primary visual cortex- where we “see” motion, illumination and transparency- striate cortex because of white band through lamina IV
where is Broadmann 41 located?
primary auditory cortex- superior temporal gyrus along medial extension known as Heschl’s gyrus
Broadmann 41 does what?
primary auditory cortex- we “hear” pitch tone loudness etc
Wernicke’s area 22 is located where?
surrounds 41 and extends almost to parietal lobe
what does Wernicke’s area 22 do?
hearing memory fx, bring together formation of written word- utilizes parietal (5, 7, 39, 40) and occipital (17-19)
where are Broadmann 5, 7, 39, 40 located?
sandwiched between somesthetic, auditory and visual receptive regions, fill parietal
what is the function of areas 5, 7, 39, 40?
synthesize memory and creative function such as reading, writing and language
what would a lesion in area 39 lead to?
alexia and agraphia- reading and writing problems
what is a connection between Wernicke’s and Broca’s area?
arcuate fasciculus- important for communication and using tools
what is thought to be the gustatory area?
Broadmann #43
what sense is associated with memories better than any other sense?
smell- stem cells in nose constantly being replaced, neurons!
where does interpretation of smell happen?
34- uncus #28- parahippacampal gyrus of temporal lobe
