Acupuncture for Parkinson’s Disease: Motor, Sensory & Chorea-Tremor Areas

Tremor paralysis, also known as Parkinson’s disease, is the most common type of extrapyramidal disorder. It is primarily a syndrome of tremor, rigidity, and bradykinesia resulting from degeneration of the substantia nigra and striatal pathways.

The primary etiology involves degeneration of the substantia nigra and striatal pathways. Due to massive loss of nerve cells, the remaining neurons often undergo gradual degeneration, with the appearance of hyaline concentric inclusion bodies in the cytoplasm and a reduction or disappearance of melanin. Similar changes are also observed in the locus coeruleus, vagal nucleus, hypothalamus, and other areas. In the later stages of this disease, ventricular enlargement may occur. Under normal conditions, dopamine is mainly synthesized in the substantia nigra, transported via the nigrostriatal pathway to the striatum for storage, and released from nerve terminals. In patients with Parkinson’s disease (tremor paralysis), degeneration of substantia nigra neurons leads to an inability to produce dopamine, resulting in a marked reduction of dopamine content in the striatum and a relative increase in acetylcholine excitability, thereby manifesting as tremor. The cause of pathological changes in the substantia nigra and the nigrostriatal pathway remains unclear. In recent years, some have speculated that this disease is a rare viral infection, an abnormal reaction to a common virus, or caused by exposure to an unknown toxin. Additionally, others consider it a form of premature aging or precocious senescence.

**Key Diagnostic Points**

Commonly seen in individuals over 50 years old, more frequent in males than females, with a slow onset and gradual worsening. The main symptoms include:

1. Tremor

It often begins in one hand, with the agonist and antagonist muscles of the affected limb exhibiting rhythmic contractions and relaxations at a frequency of 4–6 times per second. The finger tremor manifests as a “pill-rolling” movement. The tremor accelerates during emotional excitement, slows down when attention is diverted, and ceases during sleep. As the condition progresses, the tremor may spread to the ipsilateral lower limb and then to the contralateral upper and lower limbs, as well as to the jaw, tongue, and head.

II. Stiffness (Qiangzhi)

Due to increased muscle tone (rigidity), one or both limbs become stiff and inflexible. When combined with tremor, the movement resembles a cogwheel rotation, hence the term “cogwheel rigidity”. Rigidity of the facial muscles reduces expressive movements, resulting in a blank, mask-like expression known as “masked face”. Severe rigidity may cause limb pain.

III. Decreased Movement

All movements appear slow and reduced. Patients often sit motionless for extended periods. Fine motor tasks—such as untying and tying buttons with the fingers—cannot be performed smoothly. Handwriting becomes progressively smaller, a condition known as **micrographia**. Speech is slow, monotonous, and low-pitched. The stride length shortens, and the patient often walks in quick, shuffling steps propelling forward, referred to as **festinating gait**.

Furthermore, symptoms such as drooling, increased secretion of sebaceous and sweat glands may occur, and some patients may develop dementia.

【Treatment】

## I. Acupoints and Needling Techniques

**1. Motor Area (healthy side or bilateral):** The upper point is located 0.5 cm posterior to the midpoint of the anterior-posterior midline (the line connecting the glabella and the inferior border of the apex of the external occipital protuberance). The lower point is at the intersection of the eyebrow-occipital line (the line on the lateral side of the head connecting the upper border of the midpoint of the eyebrow and the tip of the external occipital protuberance) and the anterior hairline. The line connecting these two points defines the motor area. – The upper 1/5 treats contralateral lower limb paralysis. – The middle 2/5 treats contralateral upper limb paralysis. – The lower 2/5 treats contralateral facial paralysis, drooling, etc. **Procedure:** Use three 30-gauge filiform needles of 1.5 cun (approx. 40 mm). Perform routine local disinfection. Using a relay puncture technique, insert the needles at three points, with the tips directed downward along the motor area.

Insert approximately 1.4 cun. Needling sensation: localized distension and stabbing pain in all cases.

2. Sensory Area (healthy side or bilateral): Located as a parallel line 1.5 cm posterior to the motor area. The upper 1/5 of the sensory area is used for treating contralateral lower limb numbness, abnormal sensations, etc.; the middle 2/5 is used for contralateral upper limb pain, numbness, and abnormal sensations; the lower 2/5 is used for contralateral facial numbness, pain, etc. Select three 30-gauge, 1.5 cun filiform needles. Perform routine local disinfection. Insert the three needles along the sensory area downward using the relay needling technique to a depth of approximately 1.4 cun. Needle sensation: each needle elicits local distension and pain.

3. **Chorea-Tremor Area** (healthy side or bilateral): Located on a line parallel to and 1.5 cm anterior to the Motor Area. Indications: chorea, Parkinson’s disease (tremor paralysis). Use two gauge-30 filiform needles of 1.5 cun; perform routine local disinfection, then insert needles obliquely downward using **relay needling technique** to a depth of approximately 1.4 cun. Needle sensation: local distending pain.

2. Methods

The patient is seated. After selecting the upper region, insert the needle according to the appropriate method and retain it for 1 hour. At 20-minute intervals, twist the needle once (at a speed of 200 rotations per minute). Upon removal, apply pressure with a cotton ball to prevent bleeding. Treatment is administered once daily, with 10 sessions comprising one course. A 5-day rest is taken before resuming needling.

[Commentary]

Parkinson’s disease (tremor paralysis) is a common neurological condition in clinical practice. In the early stages, treating it with the above method yields quite favorable results, allowing tremor to be alleviated or controlled without the need for any medication. For patients with a longer duration of tremor (more than two years), where tremors appear in both upper and lower limbs as well as the head, or in all four limbs and the head and neck, the above method can only provide temporary relief or transient suppression during the needling session. For these more severe cases, the therapeutic outcome is less satisfactory. Moreover, such severe patients often achieve only partial relief or limited control with medication, and the efficacy of drugs is generally suboptimal. For these more advanced patients, surgical treatment may be considered.

Acupuncture and the Recognition of Early Signs

Parkinson’s disease, a progressive neurodegenerative disorder, is characterized by the degeneration of the substantia nigra and striatal pathways, leading to the classic triad of tremor, rigidity, and bradykinesia. The identification of early signs of Parkinson’s disease, such as subtle unilateral tremor, micrographia, or hyposmia, is critical for timely intervention. Acupuncture, particularly targeting motor, sensory, and chorea-tremor areas, has emerged as a complementary therapy that may help address these initial manifestations. By modulating dopaminergic pathways and reducing neuroinflammation, acupuncture may slow the advancement of early motor deficits. While not a cure, it offers a non-pharmacological approach to manage symptoms before significant neuronal loss occurs. Clinical observations suggest that early acupuncture intervention can improve functional connectivity in the basal ganglia, potentially delaying the need for higher doses of levodopa. Thus, integrating acupuncture into the therapeutic regimen from the earliest stages may provide neuroprotective benefits, enhancing patients’ quality of life as the disease progresses.

Targeting Tremor: Acupuncture for Motor Control

Tremor is one of the most characteristic and distressing motor symptoms in Parkinson’s disease, often interfering with daily activities. Parkinson’s disease tremor management traditionally relies on dopaminergic medications, but their efficacy may wane over time, and side effects can be significant. Acupuncture, by stimulating specific motor and chorea-tremor areas on the scalp and body (e.g., GV20, LI4, and extra points), has shown promise in reducing tremor amplitude and frequency. Neuroimaging studies indicate that acupuncture influences thalamic and cerebellar activity, helping to reset abnormal oscillatory rhythms. In clinical trials, patients receiving acupuncture adjunctively report a subjective decrease in resting tremor and improved hand dexterity. The sensory component of acupuncture—through activation of A-delta and C fibers—may also gate tremor-related afferent signals at the spinal level. While acupuncture does not replace pharmacotherapy, it serves as a valuable tool for Parkinson’s disease tremor management, offering a side-effect-free option to enhance motor stability and reduce disability.

Addressing Rigidity and Sensory Dysfunction

Rigidity, the increased resistance to passive movement, is a core motor feature of Parkinson’s disease that results from basal ganglia dysfunction. Parkinson’s disease rigidity treatment often involves anticholinergic agents or deep brain stimulation, but these may not fully resolve the muscle stiffness or associated sensory disturbances such as pain and paresthesias. Acupuncture, by needling acupoints along the Bladder and Gallbladder meridians, can promote local blood flow and reduce muscle tone. The technique also stimulates proprioceptive afferents, enhancing central processing of sensory input. In controlled studies, acupuncture combined with standard care significantly reduced rigidity scores (measured by UPDRS) and improved range of motion. The sensory areas targeted—especially in the extremities—help recalibrate the sensorimotor integration disrupted in Parkinson’s. Consequently, acupuncture offers a holistic Parkinson’s disease rigidity treatment that not only eases muscle stiffness but also alleviates associated discomfort, making it a valuable adjunct to physical therapy.

Modulating Disease Trajectory: Acupuncture and Symptom Progression

The natural history of Parkinson’s disease involves gradual worsening of both motor and non-motor symptoms, with Parkinson’s disease symptoms progression leading to increased disability over years. Emerging evidence suggests that acupuncture may exert disease-modifying effects by reducing oxidative stress, enhancing autophagy, and protecting dopaminergic neurons. Regular acupuncture sessions have been associated with slower decline in motor function and delayed onset of levodopa-induced dyskinesias. By stimulating the chorea-tremor and sensory areas repeatedly, acupuncture may help maintain neural plasticity in the striatum and cortex. Although long-term placebo-controlled trials are needed, observational studies indicate that patients who incorporate acupuncture early have a more favorable Parkinson’s disease symptoms progression trajectory, with lower rates of postural instability and falls. This highlights acupuncture’s potential as a neuroprotective strategy to complement conventional treatments, thereby extending the period of functional independence.

Synergy with Exercise Therapy: Enhancing Functional Outcomes

Physical activity is a cornerstone of Parkinson’s rehabilitation, and Parkinson’s disease exercise therapy has been proven to improve gait, balance, and overall mobility. Acupuncture synergizes with such exercise programs by reducing pain, fatigue, and rigidity, thereby enabling patients to participate more effectively. For instance, needling motor area points before physiotherapy can lower baseline tremor and increase muscle relaxation, allowing for a more productive session. Moreover, acupuncture’s effects on sensory feedback can enhance proprioception, which is critical for motor learning during Parkinson’s disease exercise therapy. Combined protocols—where acupuncture is administered immediately prior to structured exercise—have shown superior results in improving step length and reducing freezing of gait compared to exercise alone. This integrative approach addresses both the neurological and musculoskeletal aspects of the disease, offering a comprehensive strategy to maximize functional recovery. Thus, pairing acupuncture with tailored exercise regimens represents a promising multimodal intervention for Parkinson’s disease.