Flittering scotoma

Flittering Scotoma is a visual disturbance often associated with migraines and ocular migraines. It is characterized by a flickering or shimmering effect in the visual field, often in the peripheral vision. The phenomenon is also known as a scintillating scotoma.

Definition

A flittering scotoma is a type of visual aura that precedes a migraine. It is a temporary blind spot that flickers or shimmers, often in the peripheral vision. The term "scotoma" is derived from the Greek word "skotos," meaning darkness. In medical terminology, a scotoma is a blind spot in the visual field. When this blind spot flickers or shimmers, it is referred to as a flittering scotoma.

Symptoms

The primary symptom of a flittering scotoma is a flickering or shimmering blind spot in the visual field. This may be accompanied by other visual disturbances, such as flashes of light, zigzag lines, or halos around lights. Some individuals may also experience headache, nausea, or sensitivity to light or sound.

Causes

Flittering scotoma is most commonly associated with migraines and ocular migraines. It is thought to be caused by a wave of neuronal excitation followed by a period of neuronal inhibition in the visual cortex of the brain. This is known as cortical spreading depression.

Treatment

Treatment for flittering scotoma primarily involves managing the underlying condition, such as migraines. This may involve medication, lifestyle changes, or other therapies. In some cases, the visual disturbances may resolve on their own without treatment.

See also

• Scotoma
• Migraine
• Ocular migraine
• Visual aura
• Cortical spreading depression

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