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Biomedical subjects

R A Moody

Publications and source records attributed to R A Moody.

14 recordsLinked to original sources
PubMed1990

The lateral position--dependant occipital approach--to pineal and medial occipitoparietal lesions. Technical note.

A recent modification of the occipital transtentorial approach to the pineal region and medial-posterior hemisphere is described. The patient is operated upon in a lateral reclining (park bench) position with the side to undergo occipitoparietal craniotomy, slightly dependant. Following dural opening to the margins of the superior sagittal and lateral sinuses, gentle traction with a brain spatula facilitates the occipital transtentorial and transfalcine approach to the incisural region. Ventricular or spinal fluid drainage is often helpful. The occipital lobe falls away from the midline and falcotentorial regions by gravity. Absence of occipital parasagittal bridging veins is a helpful feature and careful convexity dural opening allows the occipital lobe to move laterally. Microsurgical treatment of pineal, splenial, falcotentorial and medial posterior hemisphere lesions may be greatly facilitated. Our experience with six cases is presented. To date, published results of this operative approach have been excellent with the risk of hemianopsia, parenchymal venous infarction, and air embolus much lessened or eliminated.

Adolescent↗
PubMed1979

Acute intracranial hypertension and auditory brain-stem responses. Part 1: Changes in the aduitory brain-stem and somatosensory evoked responses in intracranial hypertension in cats.

Changes in auditory brain-stem responses (BER's) and somatosensory evoked responses (SER's) were investigated to correlate mass volume, intracranial pressure, and neurological dysfunction in mass-induced intracranial hypertension in cats. As the intracranial pressure was raised by expansion of a supratentorial balloon, the late components of the SER's were suppressed first, followed by the early components of the SER's, then Wave V and Wave IV of the BER's, in that order. This suggests that the nonspecific reticular projections are most vulnerable to compression ischemia, and the specific somatosensory pathways are the next most vulnerable. Neural activity of the auditory pathways in the upper brain stem was also gradually suppressed, but less so than that of the somatosensory pathways. After complete transtentorial herniation, in spite of immediate mass evacuation, the function of the somatosensory pathways was greatly impaired, often irreversibly. The neural activity of the auditory pathways in the upper brain stem revealed progressive recovery during a 3-hour period. The measurements of BER Wave V is thought to be useful in predicting transtentorial herniation.

Animals↗
PubMed1979

Acute intracranial hypertension and auditory brain-stem responses. Part 2: The effects of brain-stem movement on the auditory brain-stem responses due to transtentorial herniation.

Movement of the upper brain stem (inferior colliculus) was correlated with the alterations in the amplitude of wave V of the auditory brain-stem responses (BER's) during supratentorial brain compression in cats. In vivo observation of the brain stem and postmortem inspection show that suppression of the amplitude of BER wave V reflects the extent of caudal displacement of the inferior colliculus. Marked suppression of the amplitude of BER wave V (approximately 30% of control) correlates with the beginning of transtentorial herniation, and complete suppression of the wave V indicates complete transtentorial herniation of the brain-stem and supratentorial structures. The BER wave V is thought to be a sensitive index of caudal movement of the upper brain stem due to transtentorial herniation.

Animals↗
PubMed1979

Shunt infections.

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Bacterial Infections↗
PubMed1979

Epidural hematomas of the posterior fossa.

The authors report four cases of epidural hematoma of the posterior fossa. The presenting signs and symptoms are discussed. Emphasis is placed on the need for early recognition and treatment and the fact that concomitant supratentorial lesions may be present. The radiologic findings are discussed, and special note is made of the value of computed tomographic (CT) scanning. Suboccipital craniectomy may result in complete recovery, even in moribund cases, once the lision is suspected and treated.

Adult↗
PubMed1978

Fluent aphasia after closed head injury.

A case of post-traumatic, contre-coup Wernicke's aphasia resulting from left posterior temporal hemorrhagic contusion localized by angiography and CAT scan is reported. Categorization of aphasia is reviewed, emphasizing that a fluent language disorder can be elusive to laymen and non-neurologically oriented physicians.

Adult↗
PubMed1977

Near-death experiences: dilemma for the clinician.

The rapid development of resuscitation technology points to an increasing number of near-death survivors. Many such survivors relate extraordinary experiences that profoundly color their extended lives. The author classifies a large group of these experiences and formulates the physician's appropriate response to them.

Adolescent↗
PubMed1976

Cerebrospinal fluid fistula from fractured acrylic cranioplasty plate. Case report.

The authors report a patient who developed a cerebrospinal fluid fistula secondary to a fractured methyl methacrylate cranioplasty plate. There was no external evidence of trauma. X-ray films showed no evidence of the fracture. It is suggested that the impregnation of methyl methacrylate with a radiopaque material would result in visualization of such fractures.

Acrylates↗