P Chaparro

Complejo Hospitalario Universitario de Badajoz, Ara Pacis Augustalis, Extremadura, Spain

Are you P Chaparro?

Claim your profile

Publications (5)7.83 Total impact

  • E Gil-Néciga · J A Pareja · I Chincón · S Jarrín · P Chaparro
    [Show abstract] [Hide abstract]
    ABSTRACT: Adult polyglucosan body disease (APBD) is a rare condition characterized by neuropathy, dementia, upper motor neuron dysfunction and neurogenic bladder. For diagnosis, the presence of polyglucosan bodies (PB), or PAS (+) glucose polymers, must be demonstrated. In this description of a woman with APBD and multiple entrapment neuropathy, we discuss a possible role for morphological changes induced by PB in increasing susceptibility to pressure palsies.
    No preview · Article · May 1995 · Neurologia (Barcelona, Spain)
  • [Show abstract] [Hide abstract]
    ABSTRACT: A 65-year-old man presented with daily, almost continuous muscle cramps and painless muscle contractions eight years after being diagnosed as having rheumatoid arthritis. Both cramps and contractions were present at rest, were accentuated by stress and disappeared during sleep. By night-fall the patient was plunged into an extremely disabling condition due to the continuous cramps present in the orofacial, trunk, neck and limb musculature. He even had difficulty speaking. EMG studies demonstrated that both cramps and painless contractions appeared synchronously in muscles innervated by different peripheral nerves. A state of central hyperexcitability is the probable cause of this clinical picture which has remained unchanged over the last six years.
    No preview · Article · Jun 1989 · Neurologia (Barcelona, Spain)
  • L.M. Iriarte · J Chacon · J Madrazo · P Chaparro · J Vadillo
    [Show abstract] [Hide abstract]
    ABSTRACT: An electrophysiological study of the blink Reflex was undertaken in 40 dyskinetic and 20 nondyskinetic patients with Parkinson's disease, who were matched for age, stage of disease, duration of illness and amount and nature of antiparkinsonian medication. We found that latencies of R2 responses (both ipsilateral and contralateral) were prolonged in the dyskinetic group compared to the nondyskinetic group. Moreover, the late response was more easily inhibited by conditioning stimulation in dyskinetic patients. This behavior of late response in dyskinetic parkinsonians may be attributed to the reinstatement of dopaminergic suppressive control over the segmental multisynaptic systems belonging to the reflex.
    No preview · Article · Feb 1989 · European Neurology
  • L M Iriarte · J Chacon · J Madrazo · P Chaparro
    [Show abstract] [Hide abstract]
    ABSTRACT: We have studied the electrically evoked blink reflex (R1 and R2 components) in 40 parkinsonian patients with levodopa-induced dyskinesia (15 with facial dyskinesia, 13 with limb-truncal dyskinesia and 12 with mixed dyskinesia). R2 latencies (both ipsilateral and contralateral) were significantly prolonged in dyskinetic patients. These findings are indicative of decreased excitability of brainstem interneurones in the dyskinetic parkinsonians. We found no correlation between the neurophysiological pattern of blink reflex and the localization of dyskinesia.
    No preview · Article · Jan 1989 · Functional neurology
  • L M Iriarte · J Chacón · J Madrazo · P Chaparro · J Vadillo
    [Show abstract] [Hide abstract]
    ABSTRACT: An electrophysiological study of the blink reflex was undertaken in 25 control subjects and in 57 patients with Parkinson's disease. An increase in the ipsilateral and contralateral late response was the most evident finding. The excitability cycle of recovery of the R2 component of the blink reflex after a prior conditioning shock was enhanced in the patients. A statistically significant correlation was established between the increase in the late response and the severity of akinesia and rigidity.
    No preview · Article · Jan 1988 · Functional neurology