Final answer:
The term for a shaking movement in the arms of an esthetician while touching a client doesn't have a specific medical term, but relates to the general concept of tactile stimulation and mechanoreception in medicine.
Step-by-step explanation:
A shaking movement in the arms of the esthetician while the fingertips or palms are touching the client is known specifically in the field of esthetics, rather than a medical or scientific terminology. In medical and neurological contexts, the perception of vibrations is tested using an oscillating tuning fork or quizzes on proprioception through movements. Various mechanoreceptors, such as Merkel cells, Pacinian corpuscles, and tactile (Meissner) corpuscles, are involved in the perception of vibration, deep pressure, and light touch, respectively. Proprioception tests may include instructions for praxis, or the examination of rapid, alternating movements in extremities, among others.