Dominic Stone
Hypertonia, or abnormally increased muscle tone, is caused by upper motor neuron lesions which may result from injury, disease, or conditions that involve damage to the
Explore related products
What You'll Learn
Hypertonia is an abnormal increase in muscle tone
Spastic hypertonia involves uncontrollable muscle spasms, stiffening, or straightening out of muscles, shock-like contractions, and abnormal muscle tone. It is often seen in disorders such as cerebral palsy, stroke, and spinal cord injury. Dystonic hypertonia refers to muscle resistance to passive stretching and a tendency for a limb to return to a fixed involuntary posture following movement. Dystonia is characterised by sustained or intermittent muscle contractions causing abnormal, often repetitive, movements and postures.
The management of hypertonia is individualised and directed by the patient's goals of care and the underlying cause of the condition. Treatment options include stretching, strengthening exercises, oral medications, botulinum toxin injections, phenol injections, and in severe cases, surgical procedures. Therapeutic interventions, such as physical therapy, are tailored to each patient's specific needs. Basic principles of treatment include avoiding noxious stimuli, providing frequent range-of-motion exercises, and using stretching techniques to reduce motor neuron excitability.
In the context of cerebral palsy, hypertonic cerebral palsy is characterised by overly toned, stiff, and difficult-to-control muscles. It is associated with spasticity and dystonia and is the most common type of cerebral palsy. Treatment options for hypertonic cerebral palsy include physical therapy, medications, and surgery. An individualised treatment plan is essential for improving long-term prognosis and managing symptoms and pain.
Exploring the Body's Fastest Muscle Recovery Mechanisms
You may want to see also
Explore related products
It is caused by upper motor neuron lesions
Hypertonia, or muscle hypertonicity, is an abnormal increase in muscle tone caused by upper motor neuron lesions. Upper motor neuron lesions are caused by damage to the central nervous system, which can be the result of injury, disease, or certain conditions. This damage impairs the ability of motor neurons to regulate descending pathways, leading to disordered spinal reflexes, increased excitability of muscle spindles, and decreased synaptic inhibition. The disruption of signals between the central and peripheral motor neurons results in inappropriate or decreased regulation of downstream pathways.
The clinical types of hypertonia include spasticity, dystonia, and rigidity. Spasticity is characterised by uncontrollable muscle spasms, stiffening, or shock-like contractions of all or part of a group of muscles. It is often velocity-dependent, with resistance to passive movement increasing as the speed of movement increases. Dystonia, on the other hand, is a movement disorder characterised by sustained or intermittent muscle contractions causing abnormal, often repetitive, movements or postures. It is important to note that not all dystonia is hypertonic; dystonia causes hypertonia only when there is sustained co-contraction. Rigidity is characterised by resistance to externally imposed joint movement present at very low speeds of movement and is independent of the speed or angle of the movement.
The treatment of hypertonia depends on the individual patient's needs and goals, as well as the underlying cause. Treatment options include stretching, strengthening exercises, oral medications, botulinum toxin injections, phenol injections, and surgical procedures. Therapeutic interventions should be individualised, and basic principles of treatment include avoiding noxious stimuli and providing frequent range-of-motion exercises. Icing and other topical anaesthetics can also be used to decrease reflexive activity and improve motor function.
Hypertonia is often associated with central nervous system disorders and can be classified into positive and negative symptoms. Positive symptoms increase muscle activity through hyper-excitability of the stretch reflex, resulting in rigidity and spasticity. Negative symptoms, on the other hand, are characterised by insufficient muscle activity and reduced motor function. While these classifications are typically considered separate entities, some authors propose that they may be closely related.
Tongue Muscles: Independent or Interdependent?
You may want to see also
Explore related products
It can be managed through physical therapy, medication, and surgery
Hypertonic muscle, or hypertonia, is an abnormally increased muscle tone caused by upper motor neuron pathology in the brain or spinal cord. It is characterised by an increased state of active muscle contraction, even when the muscle is at rest. This results in rigidity and resistance to passive movements. Hypertonia can be managed through physical therapy, medication, and surgery.
Physical therapy for hypertonic muscles involves a range of exercises and techniques. These include gentle rocking, where the patient lays on their tummy or back over a therapy ball and rolls forward, backward, or side to side. Side stepping is another technique, where the patient's hands are supported by a table or wall, and they shift their weight from one leg to the other. Deep pressure applied to the trunk, shoulders, or legs can also help, as it provides additional proprioceptive and sensory input. Additionally, exercises such as pushing or pulling a weighted laundry basket can improve hypertonia. Bridge exercises, where the patient lays on their back with bent knees and pushes their hips up, can also be beneficial.
For babies and children with hypertonic muscles, physical therapy can be adapted to their needs. Positioning the child comfortably and slowly moving the affected body part through its available range of motion can help increase their range of motion over time. Certain poses, such as a child's pose, can also help prevent increases in tone when the child is in a heightened state.
Medication can also be used to manage hypertonic muscles. Carbamazepine and Lignocaine have been found to reduce resistance in dystrophic myotony and improve symptoms of stiff-man syndrome. Botulinum toxin and baclofen are other medications that can be used to treat spasticity, a subtype of hypertonia.
In some cases, surgery may be an option for treating hypertonic muscles. Selective dorsal rhizotomy and orthopaedic surgery can help with resultant contractures and balancing of muscle/tendon forces about the joints. Additionally, fusion surgery may be considered for patients with chronic low back pain, but it should be combined with intensive rehabilitation therapy for optimal results.
Losing Muscle Weight: What's the Real Damage?
You may want to see also
Explore related products
Dystonia, spasticity and rigidity are clinical types of hypertonia
Hypertonia is the abnormal increase in muscle tone caused by upper motor neuron pathology in the brain or spinal cord. It is clinically characterised by spasticity, dystonia, rigidity, or a combination of these subtypes. Dystonia, spasticity, and rigidity are further explained below.
Dystonia
Dystonia is a movement disorder characterised by sustained or intermittent muscle contractions, which cause abnormal, often repetitive, movements and postures. These movements are typically patterned and twisting and may affect the limbs, head, or trunk. Dystonia can be a genetic condition or it can be triggered by cortical lesions of the thalamus or basal ganglia. It can also be caused by other conditions like cerebral palsy or brain injury. Dystonia fluctuates and is not always present.
Spasticity
Spasticity is the most common type of hypertonia. It is diagnosed when more resistance is noted in the muscle with faster movement of the joint. There is generally a catch and then a release that allows more movement. Spasticity is caused by damage to the brain or spinal cord and is commonly seen in conditions like cerebral palsy, stroke, or spinal cord injury.
Rigidity
Rigidity is characterised by resistance to externally imposed joint movement, regardless of the speed with which the limb is moved. It is often seen in Parkinson's disease or severe brain injury.
Unique Characteristics of Cardiac Muscles Explained
You may want to see also
Explore related products
It is associated with cerebral palsy, stroke, and spinal cord injury
Hypertonia, or abnormally increased muscle tone, is often associated with cerebral palsy, stroke, and spinal cord injury. It is caused by upper motor neuron pathology in the brain or spinal cord. The neurologic motor system impairment in children with cerebral palsy is frequently characterised by the presence of hypertonia. This can cause difficulty walking or controlling movements of the body. Hypertonic cerebral palsy is characterised by overly toned muscles, which become stiff and hard to control. Physical therapy, medications, and surgery are common treatments for hypertonic cerebral palsy.
Spasticity, dystonia, and rigidity are the clinical manifestations of hypertonia. Spasticity is characterised by an unexpected increase in muscle tone or stiffness, which can interfere with movement and speech, and cause discomfort or pain. Dystonia is a movement disorder that causes abnormal and repetitive movements and postures. It is marked by sustained or intermittent muscle contractions. Rigidity, also referred to as Parkinsonian rigidity, is characterised by resistance to externally imposed joint movement present at very low speeds of movement.
In the case of stroke, multi-infarct dementia is a common cause of memory loss in older people. It is caused by multiple strokes that damage brain tissue. Myelin, the insulating layer surrounding the axon of the nerve cell, helps nerve signals travel faster and farther. Myelitis, an inflammation of the spinal cord, can damage the myelin. This damage can result in neuropathy, or damage or disease in the nerves, leading to numbness or weakness.
Spinal cord injuries can also cause hypertonia. In humans, injuries to the cervical region of the spinal cord are most common. Hypertonic saline (HS) has been shown to reduce cord swelling and edema in experimental spinal cord injuries. HS administration resulted in increased serum sodium, attenuation of cord swelling, and a decreased volume of hypointense core and edema.
The Lats: Largest Back Muscles or Not?
You may want to see also
Frequently asked questions
Hypertonia is the abnormal increase in muscle tone, which can be caused by upper motor neuron pathology in the brain or spinal cord.
Symptoms of hypertonia include uncontrollable muscle spasms, stiffening or straightening out of muscles, shock-like contractions of all or part of a group of muscles, and abnormal muscle tone.
Treatment options include stretching, strengthening, positioning, oral medications, botulinum toxin injections, phenol injections, and surgical procedures.
Hypertonia is caused by upper motor neuron lesions, which may result from injury, disease, or conditions that involve damage to the central nervous system.
Hypertonic cerebral palsy is the most common type of cerebral palsy and can cause difficulty walking or controlling movements of the body.
