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Hemiparesis, also called unilateral paresis, is the weakness of one entire side of the body (hemi-means "half"). Hemiplegia , in its most severe form, is the complete paralysis of one entire side of the body.
English: This image shows an example of affected areas to represent the differences between paraplegia (left), hemiplegia (middle), and quadriplegia (right). Please note these areas may differ for each condition and are dependent upon the neurological level of injury.
Flaccid paralysis is a neurological condition characterized by weakness or paralysis and reduced muscle tone without other obvious cause (e.g., trauma). [1] This abnormal condition may be caused by disease or by trauma affecting the nerves associated with the involved muscles.
Hemiparesis – The loss of function to only one side of the body; Triparesis – Three limbs. This can either mean both legs and one arm, both arms and a leg, or a combination of one arm, one leg, and face; Double hemiparesis – All four limbs are involved, but one side of the body is more affected than the other; Tetraparesis – All four limbs
A lower motor neuron lesion is a lesion which affects nerve fibers traveling from the lower motor neuron(s) in the anterior horn/anterior grey column of the spinal cord, or in the motor nuclei of the cranial nerves, to the relevant muscle(s).
An upper motor neuron lesion (also known as pyramidal insufficiency) Is an injury or abnormality that occurs in the neural pathway above the anterior horn cell of the spinal cord or motor nuclei of the cranial nerves.
Increased pressure on the brainstem can result in dysfunction of the centers in the brain responsible for controlling respiratory and cardiac function. The most common signs are intractable headache, head tilt, and neck stiffness due to tonsillar impaction. The level of consciousness may decrease and also give rise to flaccid paralysis.
Orange: nerves coming from the left hemisphere of the brain, yellow: nerves coming from the right hemisphere. Note that the forehead muscles receive innervation from both hemispheres (yellow and orange) The cause of Bell's palsy is unknown. [1] Risk factors include diabetes, a recent upper respiratory tract infection, and pregnancy. [1] [7]