Anatomy

The nervous impulse

The neuron is different from the other cells in its capacity to generate an electric signal that is called a nervous impulse. These signals – known as action potentials – are transmitted from one neuron to another and ensure the functional activity of the brain. How are these signals transmitted? Neurons are separated from their […]

Amyloid: a protein involved in Alzheimer’s?

Amyloid is a soluble protein that is normally eliminated in healthy people. In people with Alzheimer’s, this protein becomes insoluble and agglutinates outside neurons to form amyloid (or senile) plaques (30 to 100 microns in diameter). This accumulation affects certain parts of the brain. Beta-amyloid comes from a larger protein found in the membrane surrounding healthy […]

Brain atrophy

Brain atrophy is a reduction of the size of the brain. It is due to a loss of neurons or a loss of the number of connections (synapses) between brain cells.  People who suffer from brain atrophy usually develop cognitive impairment as a result of brain damage, particular in areas associated wth memory. There are two main types […]

What part of the brain is short-term memory ?

The area of ​​short-term memory is located in the lower part of the temporal lobe and is of great importance for the temporary storage (a few tens of seconds) of an event, before it is eventually and lastingly preserved. The temporal area is part of the limbic system The temporal area of ​​short-term memory is […]

Neurons and their morphology

All neurons are not identical. These basic units of the brain are highly diverse, even within a specific brain area. They are distinguishable according to: The shape of the cell body (or soma).  Their organization and morphology of the extensions (i.e. dendrites and axon) that arise from the cell body. Four major types of neurons […]

The Brain And Movement

The parts of the brain that controls movement involve a hierarchical and interconnected network that includes:   1. Motor area of the frontal lobe   2. Basal ganglia located inside the cerebral hemispheres   3. Pons 4. Cerebellum 1 Motor areaThe highest level of the network (in direct relation with basal ganglia, the cerebellum and the pons)  Initiates the […]