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.
Hallucinogens and Dissociative Drugs. Laboratory studies suggest that dissociative drugs, including PCP, ketamine, and DXM, cause their effects by disrupting the actions of the brain chemical glutamate at certain types of receptorsâcalled N-methyl-D-aspartate (NMDA) receptorsâon nerve cells throughout the brain (Morgan, 2012; Morris, 2005).