What are the classifications of tremor? How many types of tremors are there?

There are many diseases that cause tremor, such as Parkinson's, hyperthyroidism, sinusoidal lesions, and essential tremor, and the first three can be diagnosed by examination.

Resting tremor: Tremor occurs at rest, as in a "pill-rubbing". Seen in Parkinson's disease

Intention tremor: occurs during movement, the closer the target, the more obvious it is, seen in cerebellar lesions, and essential tremor, also known as familial, hereditary benign tremor.

Asterixis: seen in early hepatic coma, chronic liver disease. Tremor senile tremor: manifested by nodding or shaking the head without increased muscle tone.

Tremor is mainly divided into resting tremor, intention tremor, essential tremor, and iatrogenic tremor.

Resting tremor is when the tremor disappears or decreases with activity, but is more pronounced at rest and is common in patients with Parkinsonism.

Imagery tremor is when the patient is not tremor at rest but is more pronounced when reaching for something.

Essential tremor is more common in the head, the cause of which is unknown, and there are certain genetic factors.

Iatrogenic tremor refers to tremor caused by the use of certain prescription medications. Therefore, special caution should be exercised when taking medication, and it is necessary to use the drug correctly and safely under the guidance of a professional doctor to avoid causing tremors.

1) Intention tremor: also known as action tremor. Refers to tremors that occur during voluntary movements.

Tremor is most pronounced during voluntary movements or when approaching a target, mainly in lesions of the cerebellum and its efferent pathways. Intention tremor can also occur without loss of muscle tone and only with limb movement.

2) Resting tremor: It is a rhythmic tremor that occurs at rest or in a relaxed state of muscles, with a general frequency of 4-g seconds, which is generally slower and slightly larger than simple tremor, and faster than the frequency of action tremor and slightly smaller in amplitude. It appears in a resting state, decreases or disappears with movement, and is more obvious in the distal limbs.

Resting tremor is one of the clinical manifestations of Parkinson's disease. Resting tremor in Parkinson's disease is often accompanied by increased muscle tone, and "cogwheel" or "lead-tube" rigidity may be detected on examination, which is easily detected during head and neck extension and flexion, and passive movement of the elbow and wrist joints. The key reflex may be normal, without pathological reflexes and sensory deficits.

The location of tremor involvement, frequency and amplitude of tremor are characteristic; Whether the tremor affects motor function depends on the severity of the tremor.

Tremor is generally divided into three symptoms: hand tremor, head tremor, and limb tremor, which are basically the main symptoms of essential tremor, which occur under conditions such as tension, agitation, and fatigue.