Presentation on theme: "The Brain Module 08. Lower - Level Brain Structures brainstem: oldest, most basic part of brain medulla – controls life-support functions like breathing."— Presentation transcript:
Lower - Level Brain Structures brainstem: oldest, most basic part of brain medulla – controls life-support functions like breathing & the cardiovascular system reticular formation – nerve network that controls wakefulness and arousal thalamus – brain’s sensory switchboard cerebellum – controls balance, muscle coordination, memories for using body
The Limbic System hypothalamus – helps regulate hunger, thirst, body temp. “flight or fight reaction, linked to emotion (aggression, pleasure, stress reactions, and mating) hippocampus – helps process new memories amygdala – linked to emotions like fear & anger
Motor Cortex controls voluntary movement (back strip of the frontal lobes) different parts of the motor cortex control different parts of the body cross-wired pattern (ex. left cortex controls right side of body) parts requiring more intricate movement have more brain tissue than larger parts of body
Somatosensory Cortex registers and processes body senses (front strip of the parietal lobes) gives more brain tissue to parts of body that are more sensitive to touch (fingertips) than those that are less sensitive (arms)
Left Hemisphere language functions (for most people) two important language regions: Broca’s Area (frontal lobe) responsible for muscle movements of speech Damage (strokes): can form ideas but not express them Wernicke’s Area (temporal lobe) responsible for language comprehension and expression; our ability to understand what is said to us
Damage to Broca’s Area This is the brain of “Tan” from whom Broca discovered the area for speech. Note the damage to Broca’s Area.