• Deep brain stimulation surgery of the STN or globus pallidus pars interna is associated with marked motor benefit in a large proportion of correctly selected patients due to high-frequency electrical stimulation of the stereotactically targeted structure. (parkinsonsinfoclub.com)
  • Electrical stimulation of the hypothalamus, basal ganglia or pedunculopontine nucleus in decorticate animals results in locomotion and a cardiorespiratory response resembling that seen during exercise. (ox.ac.uk)
  • Frequency peaks of tremor, muscle vibration and electromyographic activity at 10 Hz, 20 Hz and 40 Hz during human finger muscle contraction may reflect rhythmicities of central neural firing. (research.com)
  • In the entry basal ganglia , anatomy and physiology are reviewed and the conclusion is reached that the two essential functions of the basal ganglia are action selection and reinforcement learning . (scholarpedia.org)
  • The basal ganglia help initiate and smooth out muscle movements, suppress involuntary movements, and coordinate changes in posture. (msdmanuals.com)
  • A movement disorder marked by loss of balance and decreased muscle coordination during voluntary movements. (michaeljfox.org)
  • Simple motor tics involve a single muscle or group of muscles and may be brief (clonic), prolonged (dystonic), or a sustained isometric (tonic) contraction" (Kenney, et al. (rn-journal.com)
  • Activity in gamma motor neurons forms part of another feedback control loop to control contraction of muscles. (ualberta.ca)
  • It organizes the muscle-driven motor movements of the body behavior. (mhmedical.com)
  • Regulates muscle tone for specific, intentional body movements. (rahulgladwin.com)
  • For example, the myotatic reflex occurs when a muscle contracts after being pulled on. (ualberta.ca)
  • For example, this reflex causes muscles to relax at a certain level of tension in the contractors, preventing overload of the muscle. (ualberta.ca)
  • The crossed extensor reflex is used to compensate for the extra load imposed by limb withdrawal on anti-gravity muscles, such as those in the leg. (ualberta.ca)
  • These structures play a central role in motor function (movement), and when the basal ganglia are damaged, the child can have a wide variety of motor impairments . (abclawcenters.com)
  • Depending on the number of muscle groups involved, tics are categorized as motor or vocal, simple or complex. (rn-journal.com)
  • Comparatively, complex motor and phonic tics use more than one muscle group and are forceful, repetitive, and exaggerated. (rn-journal.com)
  • This sensory input to the spinal cord allows feedback from muscles to modify the motor signals sent to them. (ualberta.ca)
  • 8. Lindvall, O., Björklund, A.: Dopaminengic innervation of the globus pallidus by collaterals from the nigrostriatal pathway. (lu.se)
  • Dystonias are involuntary muscle contractions, which may be long-lasting (sustained) or come and go (intermittent). (msdmanuals.com)
  • For example, intramuscular injections of BTX produce local relaxation of treated muscles by inhibiting the release of acetylcholine, a neurotransmitter that is present at the junctions of nerve and muscle cells and that regulates the delivery of messages from neurons to muscle fibers. (suffernomore.com)
  • Also in skeletal muscles are Golgi tendon organs , which send activity back to the spinal cord via Ib sensory neurons. (ualberta.ca)
  • A characteristic feature of Wilson's disease - the accumulation of copper in various organs and tissues, mainly in the liver, and the basal ganglia. (medicalformat.com)
  • A natural substance found in skeletal and cardiac muscle and the liver. (suffernomore.com)
  • The muscle fibers inside the spindles are called intrafusal fibers , while the rest of the muscle fibers (which form the bulk of the muscle in the body) are called extrafusal fibers . (ualberta.ca)
  • Either the movement is totally lost or there is reduction of movement of muscle, when a person gets affected with this disorder. (healthmd.net)