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The word “lobotomy” refers to several brain surgeries that break connections between the frontal lobe and different parts of the brain. The frontal lobe is involved in many brain processes, including language, voluntary motion, and many cognitive abilities.

The different types of lobotomy include:
• topectomy, in which a surgeon removes parts of the frontal lobe
• leucotomy or leukotomy, in which a surgeon severs connections between the frontal lobe and the thalamus
• neuro-injection of sclerosing agents, in which a surgeon injects drugs that harden the fibers connecting the frontal lobe to the thalamus