Biomaterial Database

The nature of essential tremor. 1973

E M Ashenhurst

The literature concerning essential tremor is confusing. Some accounts describe tremor of a resting type and its accompaniment by other neurological abnormalities. Critical analysis of the pertinent literature leaves some question as to the validity of these observations.Clinical analysis of 34 patients with essential tremor, personally observed during a four-year period, reveals this to be a monosymptomatic condition. The tremor was usually of both a postural and action type and resting tremor was not observed. There were no other neurological abnormalities. Serious disability was infrequent and, when present, was related to upper limb tremor. Essential tremor should be readily distinguishable from other central nervous system diseases but it may be confused with Parkinson's disease or cerebellar ataxia.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009068	Movement	The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.	Movements
D010300	Parkinson Disease	A progressive, degenerative neurologic disease characterized by a TREMOR that is maximal at rest, retropulsion (i.e. a tendency to fall backwards), rigidity, stooped posture, slowness of voluntary movements, and a masklike facial expression. Pathologic features include loss of melanin containing neurons in the substantia nigra and other pigmented nuclei of the brainstem. LEWY BODIES are present in the substantia nigra and locus coeruleus but may also be found in a related condition (LEWY BODY DISEASE, DIFFUSE) characterized by dementia in combination with varying degrees of parkinsonism. (Adams et al., Principles of Neurology, 6th ed, p1059, pp1067-75)	Idiopathic Parkinson Disease,Lewy Body Parkinson Disease,Paralysis Agitans,Primary Parkinsonism,Idiopathic Parkinson's Disease,Lewy Body Parkinson's Disease,Parkinson Disease, Idiopathic,Parkinson's Disease,Parkinson's Disease, Idiopathic,Parkinson's Disease, Lewy Body,Parkinsonism, Primary
D011187	Posture	The position or physical attitude of the body.	Postures
D012146	Rest	Freedom from activity.	Rests
D002524	Cerebellar Ataxia	Incoordination of voluntary movements that occur as a manifestation of CEREBELLAR DISEASES. Characteristic features include a tendency for limb movements to overshoot or undershoot a target (dysmetria), a tremor that occurs during attempted movements (intention TREMOR), impaired force and rhythm of diadochokinesis (rapidly alternating movements), and GAIT ATAXIA. (From Adams et al., Principles of Neurology, 6th ed, p90)	Adiadochokinesis,Ataxia, Cerebellar,Cerebellar Dysmetria,Dysmetria,Cerebellar Hemiataxia,Cerebellar Incoordination,Hypermetria,Adiadochokineses,Ataxias, Cerebellar,Cerebellar Ataxias,Cerebellar Dysmetrias,Cerebellar Hemiataxias,Cerebellar Incoordinations,Dysmetria, Cerebellar,Dysmetrias,Dysmetrias, Cerebellar,Hemiataxia, Cerebellar,Hemiataxias, Cerebellar,Hypermetrias,Incoordination, Cerebellar,Incoordinations, Cerebellar
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children