Brain and Behavior Flashcards
Central Nervous System
brain and spinal cord
Peripheral Nervous System
Somatic / Autonomic → Sympathetic / Parasympathetic
Somatic
Controls skeletal muscles
Autonomic
Regulates involuntary bodily functions
Sympathetic
Arousal and stress
Parasympathetic
Returns body to resting state
Neurogenesis
Neurons are created from neural stem cells in the brain
Prenatal Brain Development
- By 3 weeks, a primitive neural tube of stem cells has formed
- The neural stem cells divide and multiply - producing neurons and glial cells
- Top of the neural tube becomes hindbrain, midbrain, and forebrain
Synaptogenesis
Birth to 3 years
Branching ‘neural networks’ enable walking, talking, and remembering
3 to 6 years
Frontal lobes develop enable rational planning
6 to 13 years
Association areas in the cortex proliferate enriching thinking, memory, language, and reading skills; Frontal lobe allows for executive functions
When does development of the brain end?
21 years
Hindbrain
Becomes brain stem/cerebellum
Midbrain
becomes origins of reward pathway
Forebrain
Becomes more developed forebrain
Brainstem
Contains the medulla, pons, and midbrain
Medulla
- Controls heart rate and blood pressure
- Controls reflexes such as vomiting, sneezing, and coughing
- Physically connects with the spinal cord
Pons
- Upper portion of brain stem
- Helps regulate respiratory functions
- Helps coordinate basic motor control and balance
- Receives sensory input such as auditory and pain signals
Cerebellum
- Little Brian - Dense structure
- Helps coordinate and fine tune motor activity, complex motor functions
- Procedural memories
- Act on ‘auto-pilot’ when the skills are used
Procedural Memories
Learn new complex motor skills via practice
Huntington’s disease and Motor control
Impacts the cerebellum and the Basal ganglia
What does the Limbic system include?
HATCH: Hippocampus, Amygdala, Thalamus, Cerebral cortex. Hypothalamus
Limbic system
A system of brain structures that plays a major role in emotional processing and memory control, adapt and respond efficiently
Thalamus
Hypothalamus
Hippocampus
Amygdala
Video on Fear Processing
Anterior Cingulate Cortex (ACC)
Cerebral cortex
Lobes of Cerebral Cortex
Frontal, Parietal, Occipital, Temporal
Frontal Lobe
Primary motor cortex
Temporal Lobe
Auditory and language comprehension
Parietal Lobe
Touch/Sensory
Occipital Lobe
Visual
Phantom Limb Sensation
The Upside Down Brain