Frontal Lobe Flashcards
Location, Function, Blood Supply, Lesion
BA 4
Primary Motor Cortex
BA 6 (Lateral)
Premotor Cortex
BA 6 (Medial)
Supplementary Motor Area
BA 8
Frontal Eye Field
Primary Motor Cortex - Function
Lateral/Medial regions control what exactly? (homunculus)
voluntary fine motor movement (R controls L, vice versa)
Lateral = UE, head/face/neck
Medial = LE, trunk
Primary Motor Cortex - Blood Supply (Lateral & Medial)
Lateral = superior MCA
Medial = ACA
Primary Motor Cortex - Lesion
contralateral hemiplegia/paresis
Premotor Cortex - Function
PLANS complex voluntary fine motor movements
Premotor Cortex -> plan -> Primary Motor Cortex
Premotor Cortex - Blood Supply
superior MCA
Premotor Cortex - Lesion
Apraxia (ideomotor, ideational)
Apraxia (Ideomotor, Ideational)
unable to perform learned, skilled voluntary movements when asked
Ideomotor = cannot perform when asked, but can complete movement randomly otherwise
Ideational = cannot complete task, but can complete each part of task individually.
“no idea” what to do
contralateral hemiplegia/paresis
hemiparesis = partial paralysis
hemiplegia = paralysis
contralateral = affecting side opposite of the lesion (L lesion, R side, etc.)
Supplementary Motor Area - Function (2 functions)
- plans (visualization) complex sequences of voluntary fine motor movements
based on previous memories of learned movements
- Micturition (urination)
Supplementary Motor Area - Blood Supply
ACA
Supplementary Motor Area - Lesion
difficulty with planning/sequencing movements
Incontinence
Frontal Eye Field - Function
conjugate eye movement
Frontal Eye Field - Blood Supply
superior MCA
Frontal Eye Field - Lesion
horizontal gaze palsy (cannot look to side opposite of lesion, eyes deviate towards side of lesion)
Brodmann’s Area 44/45 (Left)
Broca’s Area (dominant)
Broca’s Area - Function
motor production of the linguistic components of verbal communication
Broca’s Area - Blood Supply
superior MCA
Broca’s Area - Lesion
Broca’s Aphasia
Broca’s Aphasia
non-fluent, can comprehend, but can’t physically speak well. Often in short sentences or sounds.
Brodmann’s Area 44/45 (Right)
Brodmann’s Area 44/45 (non-dominant)
Brodmann’s Area 44/45 - Function
motor production of the non-linguistic components of verbal communication (emotional parts of language, often flat/monotone)
Brodmann’s Area 44/45 - Blood Supply
superior MCA
Brodmann’s Area 44/45 - Lesion
motor dysprosodia
Motor Dysprosodia
loss in ability to produce normal variations in intonation, tone, pitch, etc.
