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)
Generalized anxiety disorder Generalized anxiety disorder is a condition in which a person has nearly constant anxiety. Benign essential tremor Benign essential tremor can cause shaking of the hands and forearms and a quivering voice. Low blood sugar (hypoglycemia) Low blood sugar, or low glucose levels, causes shakiness, anxiety, clammy skin, irritability, hunger, and more.