1. Neurons, Hormones, and the Brain

2. The Nervous System
Central
• Sensory information
• Composed of the brain and spinal cord.
• Contains spinal reflexes
Peripheral
• Controls everything outside the central
nervous system
• Contains sensory nerves and motor nerves.
• Somatic - bodily
• Autonomic – self governing

4. Neurons
• The nervous system is consisted of neurons.
• Neurons have three main parts dendrites, a cell body, and axons.
• Dendrites are tree like structures that receive messages and then
transmit them towards the cell body.

5. Chemical Messengers
Neurotransmitters Hormones
• Serotonin • Melatonin
• Dopamine • Oxytocin
• Acetylcholine • Adrenal hormones-
• Norepinephrine epinephrine/norepinephrine
• GABA ( Gamma- aminobutyric acid) • Sex hormones-
• Glutamate Androgens, Estrogens,
and Pogesterone

7. Mapping the Brain
• Electrical and Magnetic detection
-Electroencephalogram (EEG)
-Transcranial magnetic Stimulation
• Scanning the Brain
-PET
-MRI

8. Entrance to the Brain
← Relays sensory messages to
the cerbral cortex
Hypothalamus ← Involved in emotions and drives
vital to survival, such as fear, hunger,
thirst, and reproduction;
Also regulates the autonomic
nervous system
Message center to and from the brain.
Medulla Pons
-Bodily functions - Sleeping
- Waking
- Dreaming
Also part of the brain stem,
the Reticular Activating System

10. The prefrontal cortex is the part of our
brain associated with complex abilities
such as reasoning, decision making,
and planning

12. Brain stem