Biomedical subjects

J Rodríguez-Gómez

Publications and source records attributed to J Rodríguez-Gómez.

5 recordsLinked to original sources

PubMed1998

[Radial nerve lesions].

INTRODUCTION: The radial nerve is a prolongation of the posterior secondary trunk of the brachial plexous. It goes round the posterior aspect of the humerus, and is found anteriorly at the level of the forearm where it divides into two branches: 1. A deep motor branch, the posterior interosseus nerve; and 2. A superficial sensory branch, the superficial radial nerve. MATERIAL AND METHODS: Lesions of the radial nerve are studied by conduction tests (sensory and motor) and electromyography. Sensory manifestations of lesions of the radial nerve are usually limited to the dorso-lateral area of the hand. Motor disorders are usually seen as defects of extension, in which the triceps muscle may be involved depending on the level at which the lesion occurs. When topographical criteria are considered, the clinical syndromes of the radial nerve may be classified as: 1. Neuropathies of the main trunk; 2. Neuropathies of the posterior interosseus nerve; and 3. Neuropathies of the superficial radial nerve. Trauma, external compression and trapping are the main causes of lesions in these syndromes. CONCLUSIONS: The radial nerve may be involved in multi-neuropathic processes forming part of a systemic illness (vasculitis, diabetes, etc.) or of a purely neuro-muscular disorder (acute neuropathy of the brachial plexus, neuropathy due to the effect of pressure and motor multifocal neuropathy.

Arm↗

PubMed1998

[Sleep-arousal dissociation in a case of hypersomnia].

INTRODUCTION: Dissociated sleep-arousal states are clinical and experimental phenomena which represent mixed forms of the three stages of this cycle (arousal, NREM sleep and REM sleep). CLINICAL CASE: We describe the case of a man who presented with a history of excessive diurnal somnolence for the previous 5 years. He also had symptoms of sleep paralysis, hypnagogic hallucinations, automatic behavior and excessive movements during sleep. He had had no episodes of loss of muscle tone; MR was normal; HL DR2 and DQwl antigens were negative; two polisomnographic and a Multiple Latency Sleep test showed: 1. Absence of respiratory disorders. 2. Normal latency of REM sleep. 3. Periods of dissociated sleep (REM without atonia and arousal with atonia), and 4. An average sleep latency of 3.2 minutes and absence of REM periods. CONCLUSION: This case adds a new type of dissociated sleep state which may accompany the disorder known as hypersomnia without REM periods.

Adult↗

PubMed1997

[The clinical significance of auditory evoked potentials of the brainstem in neonates].

INTRODUCTION: Brainstem auditory evoked potentials (BAEP) are an objective test that provides an early detection of hearing losses and a functional evaluation of the auditory pathway. MATERIAL AND METHODS: All neonates born between November 1989 and December 1994 presenting some factor of audiologic or neurologic failure were tested by ABR, in order to determine the prognostic significance of abnormalities on follow-up. RESULTS: Of 40 selected babies 17 did not pass the former test and were classified as follows: eleven in a peripheral hearing loss group of mild-moderate degree and 6 in groups of severe peripheral hearing loss or central disorder of the auditory pathway. CONCLUSIONS: On follow-up an ABR test was included disclosing that many of the mild-moderate peripheral abnormalities has a transitory nature. Infants included in the other two groups had a very poor outcome from the point of view of life expectancy and psychomotor development.

Evoked Potentials, Auditory, Brain Stem↗

PubMed1986

Sex-related differences in the effects of aspirin on the interaction of platelets with subendothelium.

Using the Baumgartner perfusion technique, marked sex-related differences in the extent of platelet-subendothelium interaction and in the effect of aspirin (ASA) have been observed. The administration of ASA (150 mg daily for 15 days) to two groups of healthy volunteers, one composed of males and the other of females, proved to block the generation of TXB2 in both cases. The basic pattern of platelet subendothelium interaction, however, was found to be markedly different in both groups studied. In men, aspirin treatment induced a significant reduction in the percentage of platelet thrombi, whereas in women, post ASA values remained at the same level as in control experiments. These results show that in the Baumgartner perfusion system women display a less thrombogenic tendency than men and that 150 mg of ASA administered daily are effective in reducing the extent of platelet-subendothelium interaction in the male group but not in the female group. These findings could explain the absence of benefit observed for women in clinical trials with aspirin.

Administration, Oral↗

PubMedDate not supplied

[Upward and downward gaze palsy with a unilateral mesencephalic hemorrhage].

INTRODUCTION: Acute vascular lesions limited to the midbrain can yield varied disturbances of eye movements. They are more often infarcts than hemorrhages. CLINICAL CASE: We present the case of a 49 year old, non-hypertensive man who presented with sudden onset of bilateral up and down gaze palsy. CT defined a unilateral hemorrhage in the right mesencephalic tegmentum. CONCLUSION: Cases of upward and downward gaze palsy in association with unilateral upper midbrain hemorrhage are very uncommon. We present a new case.

Cerebral Hemorrhage↗