Biological Psychology and the Brain

Emphasis on Biological Functions

  • Biological psychology focuses on biological functions, emphasizing:

    • Heredity

    • Hormones

    • The brain and its various parts and functions

Brain Structure Overview

  • The brain is structured into multiple parts, each serving specific functions.

Learning Through Play

  • Demonstration with Play Doh to illustrate brain parts and their locations in 3D.

  • The approach helps visualize anatomy and function.

Major Parts of the Brain

Brainstem

  • The brainstem is a crucial part located inside the two hemispheres of the brain.

  • It connects the brain to the spinal cord, facilitating communication to and from the body.

  • Visualization using Play Doh:

    • Represented as a globby mass akin to a "chicken leg" or stick shift.

    • Considered the "stem" of the brain, housing various structures within.

Reticular Formation

  • A small part located within the brainstem, responsible for:

    • Alertness and Arousal: Controls states of alertness and response to crises.

    • Connects to the sympathetic nervous system, activating the body's arousal response during stressful situations.

  • Visual representation: Demonstrated Play Doh model to indicate its small size relative to the brainstem.

Medulla Oblongata

  • Located just above the spinal cord within the brainstem.

  • Functions include:

    • Regulation of Blood Pressure

    • Heart Rate Control

    • Breathing Regulation

  • Anatomical note: The medulla surrounds the reticular formation.

  • Humor reference: Mention of Adam Sandler's movie "The Water Boy" relating to the term.

Thalamus

  • Positioned at the top of the brainstem; described as one of the most critical brain components.

  • Functions:

    • Serves as the relay station for sensory information coming to the brain.

    • For example:

    • Vision information is sent to the visual processing areas.

    • Smell and sound information is directed to respective sensory areas.

  • Analogy: Compared to an information center at a mall or university guiding visitors to specific locations.

  • Shape described as resembling a small ball.

Cerebellum

  • Located at the back of the brainstem and primarily responsible for:

    • Balance

    • Movement

    • Equilibrium

  • Characterized as sometimes being called the "little brain" due to its two hemispherical structures resembling a mini-brain.

  • Activities like balancing on one leg are controlled by the cerebellum.

  • Visualization using Play Doh:

    • Created two hemispheres to represent the cerebellum's structure.

Summary of Brain Features

  • The brainstem encapsulates:

    • Reticular formation (small and responsible for alertness)

    • Medulla (surrounds the reticular formation and regulates autonomic functions)

    • Thalamus (at the top, directing sensory information)

    • Cerebellum (attached to the brainstem, responsible for movement and balance)

  • The brainstem ultimately connects to the spinal cord, serving as a vital conduit for bodily communication.