Amygdalohippocampectomy

Surgical procedure involving the removal of the amygdala and hippocampus

Amygdalohippocampectomy

Diagram of the human hippocampus

Amygdalohippocampectomy is a surgical procedure that involves the removal of the amygdala and the hippocampus, two critical structures located in the temporal lobe of the brain. This procedure is primarily performed to treat certain types of epilepsy, particularly temporal lobe epilepsy, when seizures are not controlled by medication.

Anatomy and Function

The amygdala is an almond-shaped set of neurons located deep within the temporal lobe. It is involved in the processing of emotions such as fear, anger, and pleasure. The hippocampus, on the other hand, is a seahorse-shaped structure that plays a crucial role in the formation of new memories and is also associated with learning and emotions.

Indications

Amygdalohippocampectomy is indicated in patients with drug-resistant temporal lobe epilepsy. This type of epilepsy is characterized by seizures that originate in the temporal lobe and are often associated with mesial temporal sclerosis, a condition where there is scarring in the inner part of the temporal lobe.

Procedure

The procedure is typically performed under general anesthesia. A neurosurgeon makes an incision in the scalp and removes a portion of the skull to access the brain. Using advanced imaging techniques, the surgeon identifies the amygdala and hippocampus and carefully removes them while preserving surrounding brain tissue. The goal is to eliminate the seizure focus while minimizing damage to critical brain functions.

Outcomes

The success of an amygdalohippocampectomy is measured by the reduction or elimination of seizures. Many patients experience significant improvement in seizure control, and some may become seizure-free. However, the procedure carries risks, including memory impairment, changes in emotional processing, and other cognitive effects due to the removal of these important brain structures.

Complications

Potential complications of the surgery include infection, bleeding, and neurological deficits. Memory problems are a common concern, as the hippocampus is integral to memory formation. Emotional changes may also occur due to the removal of the amygdala.

Related pages

• Temporal lobe epilepsy
• Neurosurgery
• Epilepsy surgery
• Hippocampus
• Amygdala