Articles

The Nervous System

The nervous system is the network of all the neurons or nerve cells in the body. This system allows us to receive process and transmit information from both within and outside of the body. The nervous system has been classified into different divisions according to function. It consists of the central nervous system (CNS) and [...]

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Transmission between Neurons

Each neuron is separated from other neurons by a tiny gap called a synapse. Transmission across a synapse is chemical. The gap between one neuron and the next is called the synaptic cleft. Floating in the cleft are many calcium ions and sodium ions, charged particles and sodium. The membrane that lies before the cleft [...]

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Brain Scanning Techniques

In the 1970s, CAT scans were introduced. This contains an X-ray transmitter and detector on opposite sides of the head. X-rays are passed through the head form front to back, the ring on which the transmitter and detector is fixed upon, moves around so the head can be scanned from all angles, and then up and [...]

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Sections of the Brain (Summary)

The cortex is divided into right and left cerebral hemispheres, each of which is divided into four lobes: Frontal Temporal Parietal Occipital There has been major debate about whether functions are localised in different cortical areas (modular) or whether they are distributed Primary motor and sensory areas have been located in different lobes, each of [...]

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The Genetic Bases of Behaviour

The set of instructions which make up an organism is called its genotype. However, the genotype can express itself in different ways depending on the characteristics of the environment within which development takes place. The end result of a genotypes expression within a particular environment is called the phenotype. Different phenotypes can therefore develop from [...]

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