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Anatomy (TOPNOTCH SUPPLEMENT) > CEREBRUM > Flashcards

Flashcards in CEREBRUM Deck (14):
1

Functional areas

Anatomically: described according to lobes (frontal, parietal, temporal, occipital, limbinc and insular)

Functionally: described according to numbered areas (Broadmann's classification)

2

Frontal lobe

Motor area

Seat of mental activities

3

Parietal lobe

Somesthetic area

4

Occipital lobe

Visual center

5

Temporal lobe

Hearing center

6

Primary motor area

Pre-central gyrus

B.A. 4

7

Primary somesthetic area

Post-central gyrus

B.A. 3,1,2

8

Primary visual area

B.A. 17

9

Primary auditory area

B.A. 41, 42

10

Broca's area

Inferior frontal gyrus

B.A. 44, 45

Motor aphasia

11

Wernicke's area

Superior temporal gyrus

B.A. 22

Sensory aphasia

12

PYRAMIDAL SYSTEM

Provides voluntary control of skeletal muscles

Owes its name to the pyramidal cells of the primary motor cortex

Consits of: corticobulbar, lateral corticospinal, anterior corticospinal

Descending pathways refeerred to as Upper Motor Neurons

Motor cells in the Anterior gray horn of the SC and motor nuclei of the cranial nerves are the final common pathways for the control of skeletal muscle activity

Referred to as Lower Motor Neurons

13

Lesions of CORTICOSPINAL TRACT

Above the level of decussation manifest contralaterally (eg. Stroke involving right motor area of cerebrum - left sided paralysis)

Below the level of decussation, manifest ipsilaterally (eg spinal cord lesion on right side -right sided paralysis)

14

Highest center

Perceives sensations, commands skilled movements, provides awareness of emotions and is necessarry for memory, thinking language abilities and other higher mental functions