Eleven of the first 14 American Ph.D.s in psychology were his students. James M. Cattell (1860-1944) was a student in G. Stanley Hall's laboratory course at Johns Hopkins University and went on to study with Wilhelm Wundt in Germany in 1883.
Drug-induced tremor is a simple nervous system and muscle response to certain medications. Drugs that can cause tremor include the following: 1  Cancer medicines such as thalidomide and cytarabine.  Seizure medicines such as valproic acid (Depakote), and sodium valproate (Depakene)
What Causes Shaky Hands? Many people associate shaky hands with Parkinsonâs disease, but the most common cause of shaking hands is actually essential tremor. Essential tremor is the most common neurologic disorder affecting adults, but itâs not well understood. Itâs likely caused by a disruption in normal brain function of the cerebellum, though researchers are not entirely sure what causes the interruption, if it is a degenerative process, or how it can be stopped. People with essential tremor often experience frequent shaking. The shaking is most common in the hands, arms, head, and vocal cords, and cannot be controlled. This shaking is most obvious when you try to use a muscle. When the muscle is relaxed, the shaking will likely not occur or it will become milder.