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Action potential

Brief regenerative change in membrane potential that allows an excitable cell to transmit an electrical...

Acupuncture

Technique usually involving insertion of fine needles at body sites; indications and benefits vary by...

Acute pain

Recent-onset pain, often associated with an event or tissue injury; its duration and course depend...

Adhesive arachnoiditis

Inflammation and scarring of the arachnoid that may cause nerve-root adhesions and persistent neurological symptoms.Lire...

Adjacent segment disease

Symptoms attributed to changes in a spinal segment next to a fusion, distinct from imaging...

Alar ligaments

Paired ligaments connecting the sides of the dens to the occipital region and helping limit...

Allodynia

Pain triggered by a stimulus that is normally not painful, such as light touch.Lire cette...

Analgesic

Medication intended to reduce pain without necessarily treating its cause.Lire cette fiche en françaisIn this...

Ankylosing spondylitis

Form of axial spondyloarthritis with characteristic sacroiliac changes visible on radiographs.Lire cette fiche en françaisIn...

Annular fissure

Separation of fibres within the disc annulus. It may appear on MRI without necessarily explaining...