--- title: "Partial Paralysis (Hemiparesis): Causes, Treatment and Rehabilitation" description: "Hemiparesis is weakness on one side of the body, most often after stroke. What it is, how it differs from hemiplegia and how rehabilitation helps." date: 2026-10-24 lastmod: 2026-11-02 canonical: https://drmotiva.com/en/articles/partial-paralysis-hemiparesis/ lang: en --- # Partial Paralysis (Hemiparesis): Causes, Treatment and Rehabilitation Partial paralysis, or **hemiparesis**, means weakness on one side of the body while some movement remains. It is the most common motor problem after stroke and can also follow brain injury, brain tumours or other neurological conditions. When there is no voluntary movement at all, the term [hemiplegia](https://drmotiva.com/en/articles/hemiplegia/) is used. ## Why does one side become weak? Each side of the brain controls the opposite side of the body. A stroke in the left hemisphere therefore causes right-sided weakness, and vice versa. The face, arm and leg may be affected to different degrees, depending on the area involved. See [Left- or right-sided stroke](https://drmotiva.com/en/articles/left-or-right-sided-stroke/). Further reading: the [guide “Stroke”](https://drmotiva.com/en/guides/stroke/) and the articles [Stroke Rehabilitation: Ischaemic and Haemorrhagic Stroke](https://drmotiva.com/en/articles/stroke-rehabilitation/) and [When Will a Stroke Patient Walk Again? Factors That Shape Walking Recovery](https://drmotiva.com/en/articles/when-will-a-stroke-patient-walk/). ## Common problems with hemiparesis - Reduced strength and control in the arm, hand or leg - Changed muscle tone, including spasticity - Balance problems and an increased risk of falls - Difficulty walking, often with foot drop - Shoulder pain on the weaker side ## How is hemiparesis treated? Treatment is planned after examination and is based on the patient’s goals. Evidence supports physical rehabilitation that combines different approaches [2], and repetitive, task-specific training [1]. Options may include: - Task-oriented physiotherapy and gait training - Constraint-induced movement therapy for suitable patients with some hand movement [3] - Occupational therapy for daily activities - Orthoses, such as ankle-foot orthoses - Spasticity treatment - Robot-assisted therapy and non-invasive brain stimulation where appropriate ## What ‘partial’ means In hemiparesis, some voluntary movement remains on the affected side, unlike hemiplegia, where there is little or no movement. Weakness may be mild (for example clumsiness of the hand) or marked (for example being able to lift the leg only slightly). It often comes together with changes in muscle tone, sensation, balance and coordination. When the cause is a partial (incomplete) injury of the motor pathways, the remaining connections offer a basis for training and recovery. ## The typical course of recovery Improvement is usually fastest in the first weeks and months. Leg function and walking often return earlier than fine hand movement. Afterwards, progress slows but can continue with practice. The course is assessed regularly and goals are adjusted accordingly. ## How it is assessed The PM&R physician examines strength in each muscle group, muscle tone, sensation, balance, walking pattern, hand function and daily activities, and reviews imaging and other results. Standardised scales are used to measure progress and plan treatment. ## Treatment options in general terms - **Task-specific, repetitive practice** of walking, transfers and arm tasks - **Strength, endurance and balance exercise** - **Orthoses,** such as an ankle-foot orthosis for foot drop (difficulty lifting the front of the foot) - **Spasticity treatment** when tightness limits movement or causes pain - **Electrical stimulation, mirror therapy and robot-assisted training** in selected patients, alongside active therapy ## What families can do - Encourage use of the weaker side in daily tasks instead of compensating entirely with the stronger side - Help with the home exercise programme set by the team - Remove trip hazards and ensure safe footwear - Watch for pain, swelling or skin problems on the affected side ## When to see your physical medicine and rehabilitation specialist After acute hospital care, the rehabilitation process is best led and advised by a physician specialised in physical medicine and rehabilitation (PM&R, also called physiatry). At home, too, it is worth consulting a PM&R specialist, who examines the patient, sets goals and guides therapy and supportive treatments together with the physiotherapist and the wider team. Ask for a review if: - function is getting worse instead of better, or progress has stalled for several weeks - new pain, stiffness, swelling or falls appear - mood, sleep, swallowing or bladder control change - you are wondering whether a robotic or other advanced therapy might be suitable Whether robotic or other advanced therapies are suitable is decided by a PM&R specialist focused on neurorehabilitation. Prof. Dr. Engin Çakar works in this field and can be consulted online or in person; otherwise, consult a PM&R specialist near you. **Call emergency services immediately** for sudden new weakness, facial drooping, difficulty speaking, a severe headache or loss of consciousness: these can be signs of a new stroke. ## Frequently asked questions **Is partial paralysis permanent?** Many patients regain some function. The degree of recovery varies and depends on the severity of the injury and on rehabilitation. How long treatment takes is discussed in [Hemiparesis recovery time](https://drmotiva.com/en/articles/hemiparesis-recovery-time/). **Can exercises at home help?** Yes, when taught and progressed by the therapy team. Home practice is an important addition to supervised therapy. **Is hemiparesis the same as a ‘mild stroke’?** Not necessarily. Hemiparesis describes the weakness, not the overall severity. Even mild weakness may come with fatigue, balance, attention or mood problems that need attention. **Can hemiparesis get worse later?** The weakness itself does not usually worsen without a new event, but inactivity, spasticity and pain can reduce function. Sudden worsening needs urgent medical assessment. ## Assessment and contact You can request an appointment or a second-opinion review of existing reports and imaging: [Contact & second opinion (WhatsApp)](https://drmotiva.com/go/wa?l=en&t=&loc=inline_contact&p=%2Fen%2Farticles%2Fpartial-paralysis-hemiparesis%2F). This page is general health information. Diagnosis and treatment decisions are made individually after examination. ## Sources 1. Hatem SM, et al. Rehabilitation of Motor Function after Stroke: A Multiple Systematic Review Focused on Techniques to Stimulate Upper Extremity Recovery. Front Hum Neurosci. 2016. [PMID: 27679565](https://pubmed.ncbi.nlm.nih.gov/27679565/) 2. Pollock A, et al. Physical rehabilitation approaches for the recovery of function and mobility following stroke. Cochrane Database Syst Rev. 2014. [PMID: 24756870](https://pubmed.ncbi.nlm.nih.gov/24756870/) 3. Corbetta D, et al. Constraint-induced movement therapy for upper extremities in people with stroke. Cochrane Database Syst Rev. 2015. [PMID: 26446577](https://pubmed.ncbi.nlm.nih.gov/26446577/)