Key Brain Structures and Functions

Cerebellum

• Important for movement and balance.
• Translates to "little brain."

Brainstem

• Vital for survival functions.
• Comprises midbrain, pons, and medulla.

Spinal Cord

• Connects brain to the body.
• Conveys signals between brain and outside world.

Cerebral Cortex

• Analyzes sensory information.
• Responsible for higher functions: thinking, memory, language, and personality.
• Split into two hemispheres connected by the corpus callosum.
• Notion of "left-brain vs right-brain" is a myth.

Frontal Lobe

• Oversees motor function, language, memory, and planning.
• Contains: motor cortex, Broca's area (speech production, damage leads to Broca's aphasia).
• Houses prefrontal cortex (PFC) associated with executive function, inhibiting responses.

Parietal Lobe

• Specialized for touch and perception (somatosensory cortex).
• Facilitates object tracking; damage can cause hemispatial neglect.

Temporal Lobe

• Essential for memory, emotion, and auditory processing.
• Contains Wernicke's area (language comprehension; damage results in Wernicke's aphasia).

Occipital Lobe

• Responsible for vision; primary visual cortex processes visual information.

Limbic System

• Involves thalamus (sensory relay), hypothalamus (regulates bodily functions and emotions), amygdala (processes fear, negative emotions), and hippocampus (memory formation and spatial organization).
• Interconnected structures contribute to emotional responses and memory.

Basal Ganglia

• Important for movement; damage can lead to Parkinson's disease due to dopamine loss.

Summary of Brainstem Components

• Midbrain: tracks visual stimuli and reflex response.
• Pons: connects brain regions, primarily connective tissue.
• Medulla: regulates vital involuntary functions (breathing, heart rate).

Spinal Cord

• Thick bundle of nerves; part of the central nervous system.
• Important for conveying signals and influences emotional experience through physical sensation.