Quadriceps Setting. This exercise helps to strengthen the quadriceps muscle (the big muscle on the front of the thigh), an important stabilizer of the knee. click to enlarge. Lie on your back with the leg you want to exercise straight. Place a small rolled towel underneath the knee.
Hallucinogens can cause an excited catatonic state, including 3,4-methylenedioxymethamphetamine (ecstasy) and phencyclidine (angel dust). Carbon monoxide poisoning can cause catatonia due to damage to the basal ganglia.
Twin studies suggest that at least a susceptibility to psychosis may be hereditary, while the experiences with organic, postpartum and drug-induced psychosis point to a potentially identifiable cause or trigger that will set the disorder in motion. Research into what causes a psychotic disorder is ongoing.