SALEM, Ore. — Crime suspects suffering solely from certain sexual disorders no longer could plead insanity as a defense under a measure passed yesterday by the Senate.

The bill was approved 29-1 and now goes to the House.

The measure is part of a larger effort by mental-health authorities to restrict uses of the insanity defense, in which accused offenders claim a mental disease or defect influenced their actions.

Defendants who are found guilty "except for insanity," rather than going to prison, are put in custody of the Psychiatric Security Review Board and usually sent to Oregon State Hospital.

The board monitors their progress and has authority over releases.

Sen. Doug Whitsett, R-Klamath Falls, said the measure, Senate Bill 40, would no longer consider such behavior as voyeurism, exhibitionism and fetishism as mental diseases or defects for which the insanity plea could be used. The hospital isn't equipped to treat such offenders, he said.

The legislation would "allow more appropriate placement in corrections facilities," he said.

A major mental-heath-advocacy group, NAMI, supports the bill, said John Holmes, director of the Multnomah County arm of the organization.