The effect of spasticity on cortical somatosensory-evoked potentials: changes of cortical somatosensory-evoked potentials after botulinum toxin type A injection. 2002

Eun Sook Park, and Chang Il Park, and Deog Young Kim, and Yong Rae Kim
Rehabilitation Department, Yonsei University College of Medicine, #120-752 Seoul, Korea.

OBJECTIVE To evaluate the changes in cortical somatosensory-evoked potentials (SEPs) after botulinum toxin type A injection to determine what effect spasticity has on cortical SEPs. METHODS Intervention study and before-after trial. METHODS University-affiliated hospital in Korea. METHODS Twelve children with spastic hemiplegic cerebral palsy (CP), 7 children with spastic diplegic CP, and 8 patients with traumatic brain injury. METHODS All participants had botulinum toxin type A injected into the muscles of the spastic limb. METHODS SEPs were recorded before and 7 days after the botulinum toxin type A injection. Spasticity of the affected spastic limb was also measured. The short latency and amplitude of waves in SEPs were measured. The SEP results were divided into 3 groups: flat (no evoked potential), abnormal (evoked but delayed in latency), and normal (clear waveform with normal latency). RESULTS The normal response of cortical SEP increased after injection. The SEPs exhibited more frequent improvement in the limbs, with greater improvement of spasticity in grade (>1.0 grade) and in patients of younger age (<3y) after injection (P<.05). CONCLUSIONS The observed improvement of cortical SEPs with associated reduction of spasticity that occurred after the botulinum toxin type A injection indicates that spasticity itself can be considered a factor affecting cortical SEPs.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D007273 Injections, Intramuscular Forceful administration into a muscle of liquid medication, nutrient, or other fluid through a hollow needle piercing the muscle and any tissue covering it. Intramuscular Injections,Injection, Intramuscular,Intramuscular Injection
D008279 Magnetic Resonance Imaging Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques. Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297 Male Males
D009128 Muscle Spasticity A form of muscle hypertonia associated with upper MOTOR NEURON DISEASE. Resistance to passive stretch of a spastic muscle results in minimal initial resistance (a "free interval") followed by an incremental increase in muscle tone. Tone increases in proportion to the velocity of stretch. Spasticity is usually accompanied by HYPERREFLEXIA and variable degrees of MUSCLE WEAKNESS. (From Adams et al., Principles of Neurology, 6th ed, p54) Clasp-Knife Spasticity,Spastic,Clasp Knife Spasticity,Spasticity, Clasp-Knife,Spasticity, Muscle
D009465 Neuromuscular Agents Drugs used for their actions on skeletal muscle. Included are agents that act directly on skeletal muscle, those that alter neuromuscular transmission (NEUROMUSCULAR BLOCKING AGENTS), and drugs that act centrally as skeletal muscle relaxants (MUSCLE RELAXANTS, CENTRAL). Drugs used in the treatment of movement disorders are ANTI-DYSKINESIA AGENTS. Skeletal Muscle Relaxants,Neuromuscular Effect,Neuromuscular Effects,Agents, Neuromuscular,Effect, Neuromuscular,Effects, Neuromuscular,Muscle Relaxants, Skeletal,Relaxants, Skeletal Muscle
D011930 Reaction Time The time from the onset of a stimulus until a response is observed. Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D001930 Brain Injuries Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits. Brain Lacerations,Acute Brain Injuries,Brain Injuries, Acute,Brain Injuries, Focal,Focal Brain Injuries,Injuries, Acute Brain,Injuries, Brain,Acute Brain Injury,Brain Injury,Brain Injury, Acute,Brain Injury, Focal,Brain Laceration,Focal Brain Injury,Injuries, Focal Brain,Injury, Acute Brain,Injury, Brain,Injury, Focal Brain,Laceration, Brain,Lacerations, Brain
D002547 Cerebral Palsy A heterogeneous group of nonprogressive motor disorders caused by chronic brain injuries that originate in the prenatal period, perinatal period, or first few years of life. The four major subtypes are spastic, athetoid, ataxic, and mixed cerebral palsy, with spastic forms being the most common. The motor disorder may range from difficulties with fine motor control to severe spasticity (see MUSCLE SPASTICITY) in all limbs. Spastic diplegia (Little disease) is the most common subtype, and is characterized by spasticity that is more prominent in the legs than in the arms. Pathologically, this condition may be associated with LEUKOMALACIA, PERIVENTRICULAR. (From Dev Med Child Neurol 1998 Aug;40(8):520-7) Diplegic Infantile Cerebral Palsy,Little Disease,Monoplegic Cerebral Palsy,Quadriplegic Infantile Cerebral Palsy,Spastic Diplegia,CP (Cerebral Palsy),Cerebral Palsy, Athetoid,Cerebral Palsy, Atonic,Cerebral Palsy, Congenital,Cerebral Palsy, Diplegic, Infantile,Cerebral Palsy, Dyskinetic,Cerebral Palsy, Dystonic-Rigid,Cerebral Palsy, Hypotonic,Cerebral Palsy, Mixed,Cerebral Palsy, Monoplegic, Infantile,Cerebral Palsy, Quadriplegic, Infantile,Cerebral Palsy, Rolandic Type,Cerebral Palsy, Spastic,Congenital Cerebral Palsy,Diplegia, Spastic,Infantile Cerebral Palsy, Diplegic,Infantile Cerebral Palsy, Monoplegic,Infantile Cerebral Palsy, Quadriplegic,Little's Disease,Monoplegic Infantile Cerebral Palsy,Rolandic Type Cerebral Palsy,Athetoid Cerebral Palsy,Atonic Cerebral Palsy,Cerebral Palsies, Athetoid,Cerebral Palsies, Dyskinetic,Cerebral Palsies, Dystonic-Rigid,Cerebral Palsies, Monoplegic,Cerebral Palsy, Dystonic Rigid,Cerebral Palsy, Monoplegic,Diplegias, Spastic,Dyskinetic Cerebral Palsy,Dystonic-Rigid Cerebral Palsies,Dystonic-Rigid Cerebral Palsy,Hypotonic Cerebral Palsies,Hypotonic Cerebral Palsy,Mixed Cerebral Palsies,Mixed Cerebral Palsy,Monoplegic Cerebral Palsies,Spastic Cerebral Palsies,Spastic Cerebral Palsy,Spastic Diplegias
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children

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