Upload-P431-Chapter 16 (1)

Upload-P431-Chapter 16 (1) - Chapter 16: The frontal lobe...

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Unformatted text preview: Chapter 16: The frontal lobe Chapter I. II. III. IV. Anatomy Theories of function Symptoms of frontal lobe lesions Clinical neuropsychological assessment I. Anatomy I. Motor cortex: Brodmann’s area 4 (precentral Motor gyrus) gyrus) Premotor and supplementary motor cortex: Premotor Brodmann’s areas 6 and 8. Brodmann’s Prefrontal cortex: anterior portion of the frontal Prefrontal lobe. lobe. Dorsolateral prefrontal cortex Inferior prefrontal cortex Inferior Broca’s area: Brodmann’s area 44. II. Theories of functions II. A. Motor cortex Controls different parts of the body to execute Controls movement. movement. B. Premotor and supplementary motor cortexes Program the sequence of movement. Premotor cortex: plan the sequence of the Premotor movement in response to external cues. movement Supplementary motor cortex: plan the sequence Supplementary of the movement in response to internal events. of C. Prefrontal cortex C. Controls the cognitive processes so that Controls appropriate movements are selected at the correct time and place. correct Dorsolateral area: select behavior based on Dorsolateral internal knowledge. internal Inferior area: select behavior in context. III. Symptoms of Frontal Lobe Lesions III. A. Damage to the motor cortex Loss of fine and independent finger movement. Loss of strength and speed in hand and limb Loss movement. movement. B. Damage to premotor and supplementary motor B. cortex. cortex. Difficulty copying a series of facial movements. C. Damage to prefrontal cortex C. Normal IQ but impaired divergent thinking. Loss of behavioral spontaneity measured by Loss Thurstone Word-Fluency and Gotman-Milner Design Fluency test. General loss of spontaneous behavior, General resulting in patients appearing lethargic or lazy. lazy. Loss of response inhibition measured by Loss Wisconsin Card Sorting and Stroop tests, resulting in perseveration. resulting Impaired memory for the temporal order Impaired (temporal memory). (temporal Changes in social behavior and personality Pseudodepression: condition of personality in Pseudodepression: which apathy, indifference, and loss of initiative are apparent. are Pseudopsychopathy: condition of personality in Pseudopsychopathy: which immature behavior, lack of tact and restraint are apparent. restraint IV. Clinical neuropsychological assessment. IV. A. Hand dynamometer: strength of movement. B. Finger tapping: speed of movement. C. Facial sequence: movement sequence. D. Thurstone (Chicago) Word Fluency: verbal Thurstone behavior spontaneity. behavior E. Gotman-Milner Design Fluency: nonverbal Gotman-Milner behavior spontaneity. behavior F. Wisconsin Card Sorting: response inhibition. G. Stroop: response inhibition. ...
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