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Lecture 10

PSYA01H3 Lecture Notes - Lecture 10: Prefrontal Cortex, Frontal Lobe, Sensory Neuron

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Steve Joordens

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Lecture 10:
Frontal Lobotomy: Surgical severance of nerve fibers connecting the frontal lobes to the
thalamus that has been performed especially formerly chiefly to treat mental illness.
o Advantages: Severs connections disconnecting memories and future concerns.
o Disadvantages: emotional flatness, inability to plan, indifference to the opinions
of others, no desire for simulation, etc.
Pre-frontal Cortex:
o Damage to the pre-frontal cortex:
Slowing of thoughts and loss of spontaneity
Perseveration errors
Tested through the card sorting experiment.
Tests one’s ability to adapt to a changing environment.
Loss of self-awareness and having a flat affect
Deficiencies in foresight and planning
Tendency to confabulate
Pre-motor Cortex: An area of motor cortex lying within the frontal lobe of the brain just
anterior to the primary motor cortex.
o Sensory strip: Receives input from the external world.
o Motors strip: Produces output on the external world.
Phantom limb pain: The sensations felt in an absent limb in an individual.
The brain devotes more area for regions of the body with more
sensory neuron input.
Hippocampus: The region of the brain which takes current stimuli and information and
stores it for future reference.
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