Biological Psychology-Lecture Slides 03-Psychology-Andrew Weeks, Slides of Biological Psychology

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Topics

3.1 General Layout of the Nervous System 3.2 Cells of the Nervous System 3.3 Neuroanatomical Techniques and Directions 3.4 Spinal Cord

3.5 Five Major Divisions of the Brain

3.6 Major Structures of the Brain

General Layout of the Nervous System

The major divisions of the nervous system.

General Layout of the Nervous System

Central Nervous

System (CNS)

• Brain (in the skull)
• Spinal Cord (in the spine)

Peripheral Nervous

System (PNS)

• Located outside of the skull and spine
• Serves to bring information into the CNS and carry signals out of the CNS

Biopsychological Research

Brain

CENTRAL

Spinal Cord

PERIPHERAL

Autonomic Somatic

Parasympathetic Sympathetic

The Peripheral Nervous System

PERIPHERAL

Autonomic Somatic

Parasympathetic Sympathetic

PERIPHERAL

Autonomic Somatic

Parasympathetic Sympathetic

The Autonomic Nervous System

Autonomic Nervous System

All nerves are efferent

Sympathetic and parasympathetic nerves generally have opposite effects

Two-stage neural paths, neuron exiting the CNS synapses on a second- stage neuron before the target organ

Meninges, Ventricles, and Cerebrospinal Fluid (CSF)

CNS encased in bone and covered by three meninges

• Dura mater – tough outer membrane
• Arachnoid membrane – web-like
• Pia mater – adheres to CNS surface

Cerebrospinal fluid (CSF)

• Fluid serves as cushion

The Cerebral Ventricles

The human brain Neurons

Neurons and the Human Brain

An amazingly intricate network of neurons

Cells that receive and transmit electrochemical signals

Neurons

Specialized cells for the reception, conduction, and transmission of electrochemical signals

Many sizes and shapes

Cells of the Nervous System: Anatomy of Neurons

The major internal features of a typical neuron

The cell membrane is a lipid bilayer with signal proteins and channel proteins embedded in it

Cells of the Nervous System: Anatomy of Neurons