Cerebrum ppt 19 Flashcards
What is the division of the cerebrum
Neocortex 90% (six layer cortex)
Allocortex 10 % (archicortex and paleocortex)
The central sulcus lie between?
the pre(motor) cortex and the post (somatic sensory) cortex
Lobes and Functions of the cerebrum
Frontal- motor (voluntary), motivation, aggression, smell, mood
Parietal- sensory (except smell, hearing and vision)
Occipital- vision
Temporal- smell, hearing and memory
What does the cerebral medulla consist of?
association fibers(same hemisphere) Commissural fibers (one hemi to another) Projection fibers (b/w cerebrum and other parts of brain)
Brodmann Areas 1,2,3 4 6 8 17 18/19 22 39 41/42 44/45
1,2,3- Sensory (parietal lobe) 4 Motor 6 premotor (planning and apraxia) 8 Frontal lobe eye 17 occipital lobe eye 18/19 extrastriate 22 Wernicke 39 Angular Gyrus 41/42 Auditory cortex 44/45 Broca
What is supplied by the MCA
Lat. part of frontal, parietal and upper temporal
basal ganglia
upper limb and head region of brain
What is supplied by the ACA
Medial part of frontal and parietal
4/5 corpus callous
lower limb region of brain
What is supplied by the PCA
Occipital lobe
lower temporal
midbrain
splenium
Watershed Infarcts
Between ACA-MCA or MCA-PCA. wedges
proximal arm and leg weakened
if in dominant hemisphere-transcortical aphasia
M/P- visual processing
Sagittal Sinus Thrombosis
Hypercoagulable state Preg. &1st weeks post partum Seizures, headache papilledema treat with anticouagulation
How do you test for dominant hemisphere?
Wada Teat- sodium amobarbital (amytal)
Split Brain syndrome
Corpus Callosum disfunction
Each hemisphere function independently
Alien Hand Syndrome
What is Apraxia?
inability to perform motor activities in the presence of intact motor and sensory systems and normal comprehension.
Premotor lesion
What are the types os apraxia
IDEOMOTOR- intransitive or imaginary moves. Damage to 22
IDEATIONAL- use of real object. 22
CONSTRUCTION- Draw
GAIT- wide base short steps
What are Dysprosodies?
nondominant hemispheric language deficits that affect the emotionality of speech
