2018 Neuroscience Lecture 3 PDF

## 2018 w5 Lecture 3 ### Neuroscience - brach = hardware - Psychological Processes = software - Psychologists study neurosciences to enrich their understanding of Psychological processes ### 2 Major Systems: - **Central Nervous System (brain & spinal cord)** - **Peripheral Nervous System (rest of...

## 2018 w5 Lecture 3 ### Neuroscience - brach = hardware - Psychological Processes = software - Psychologists study neurosciences to enrich their understanding of Psychological processes ### 2 Major Systems: - **Central Nervous System (brain & spinal cord)** - **Peripheral Nervous System (rest of the body)** - ***Somatic Nervous System*** - Motor Nevas System - ***Autonomic Nervous System*** - Not aware of this workings - Controls heart rate, pupils, salivation etc. - The four F's: feeding, fight, flight, and sex. - Has two branches - **Sympathetic (prepares for action, "fight-or-flight")** - **Parasympathetic (slows down, calms)** - Uses neurotransmitters - ***Enteric Nervous System*** - Controls gastrointestinal tract - Interacts with brain but functions independently ### Central Nervous System - 86 billion neurons - Brain & Spinal Cord protected by - Bone - Meninges - Blood-Brain Barrier #### Blood-Brain Barrier: - Functionality - Has little holes at the end that let things leave blood and outer tissue. - Chemistry of your brain makes it vulnerable to toxins/chemicals. - Drugs that are good at getting across the barrier are much more lethal. ### Spinal Cord - A cable of neural fibers with "roots" coming off. - Interface between brain and PNS. - Every part of your body (neck down) is connected to the spinal cord. - Controls a few behaviours (spinal reflexes)