Mark J Rosen

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Tremor disabled subjects were tested in two dimensional tracking tasks. The subjects had action tremor due to various etiologies. Both continuous and discrete targets were used. Displacement sensing and force sensing joysticks were compared. The effect of filtering of the control signal was evaluated. Position and velocity control were compared. While(More)
Glutethimide has been used to control essential tremor. Its efficacy in the treatment of disabling cerebellar and rubral tremor was assessed in an open study of six patients with multiple sclerosis and two patients with traumatic brain injury. Functional and quantitative tremor severity was assessed before treatment and 7 to 14 days after a stable dose was(More)
Patients with severe action tremor have uncontrollable, relatively rapid oscillatory motion super-imposed on otherwise useable slower voluntary motor activity. Because a mechanical damper produces an opposing force proportional to velocity, applying damping loads to tremorous limbs should attenuate the (high-velocity) tremor component of movement while(More)
Conventional neurological practice is generally not successful in restoring independent upper extremity function to people with disabiling tremors. The authors have been investigating an orthotic approach, the application of energy-dissipating loads to affected limbs, to allow voluntary intent to be expressed while attenuating tremor. CEDO 1 is a prototype(More)
The Viscous Beam is a wearable tremor-suppression orthosis that applies viscous resistance to motion of the wrist in flexion and extension. The orthosis reduces tremor amplitude and is small enough to be worn under the sleeve of a shirt. Hand and forearm cuffs couple the damper to the user. The cuffs permit full thumb and finger motion, wrist flexion and(More)
The purpose of this study was to assess the effectiveness of the CEDO 1, a prototype Controlled Energy-Dissipating Orthosis for persons disabled by pathological intention tremor. Conventional neurological practice is generally unsuccessful in restoring independent upper extremity function to persons with debilitating tremors. The CEDO 1 was built to(More)
The effect of dissipative mechanical loads on spastic gait has been studied, to evaluate the feasibility of using mechanically damped orthoses to effect functional improvements in the gait of spastic patients. This concept is based on a hypothesis citing uninhibited, velocity-dependent stretch reflexes as a possible causal factor in spastic gait(More)
The tremor of chronic alcoholism, although clinically similar to essential tremor, has been considered a distinct syndrome. Its underlying mechanism was analyzed in five patients (none in the acute stages of alcohol withdrawal) hospitalized in an alcohol detoxification program. All five patients performed tracking tasks in which they pursued a linearly(More)
Antecedentes: El conocimiento y el uso de los cigarrillos electrónicos han aumentado exponencialmente en losúltimos años sobre todo entre los jóvenes y las mujeres en algunos paises. La rápida aceptación de los cigarrillos electrónicos puede atribuirse en parte, a la percepción creada por las campañas de marketing y los titulares de prensa que aseguraron(More)
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