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
