: These are physical responses to direct touch or stimulation. If the sacral segments of the spinal cord (S2–S4) remain intact, a man can still achieve a reflex erection even if the cord is completely transected at a higher level (typically T11 or above). These can also occur spontaneously due to a full bladder or internal muscle spasms.
: These are triggered by thoughts, sights, or sounds. After a complete transection, the nerve pathways between the brain and the genitals are usually blocked, making these mental triggers ineffective for producing a physical response. Function and Management transectual erection
After a spinal cord injury (SCI), the body’s ability to achieve an erection depends on the location and severity of the "transection". : These are physical responses to direct touch
