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Biomedical subjects

J G Allen

Publications and source records attributed to J G Allen.

At least 37 records · Page 2Linked to original sources
PubMed1999

A self-report measure to screen for trauma history and its application to women in inpatient treatment for trauma-related disorders.

The authors developed the Trauma History Screen to screen for potentially traumatic events in women admitted for specialized treatment of trauma-related disorders. The questionnaire contains 14 items assessing commonly occurring traumas, and respondents indicate the frequency with which they have experienced the traumas as well as the age at which the trauma occurred. Six items pertaining to interpersonal trauma form an internally consistent subscale. The authors present normative data for a sample of 102 traumatized patients as well as correlations with scores from the Childhood Trauma Questionnaire, the Impact of Event Scale, and the Dissociative Experiences Scale. The findings provide some indication of convergent validity for the Trauma History Screen, and the authors recommend using the questionnaire to alert clinicians to trauma that should be explored more fully in the context of a clinical relationship.

Adolescent↗
PubMed1998

Complex posttraumatic stress disorder in women from a psychometric perspective.

Herman's (1992a) formulation of complex PTSD was not incorporated into the Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM-IV]; American Psychiatric Association, 1994), but finds ample confirmation in personality assessment of women in inpatient treatment for trauma-related disorders. This study relates MCMI-III and Adult Attachment Scale scores to a self-report measure of childhood abuse and neglect, the Childhood Trauma Questionnaire. Consistent with Herman's formulation, the data reveal a wide array of symptoms coupled with two facets of relationship disturbance: (a) enmeshment in ambivalence (depressive, dependent, and self-defeating personality as well as ambivalent attachment), and (b) more profound isolation (avoidant and schizoid personality coupled with profoundly insecure attachment). We present a model for using such psychometric findings in patient education and diagnostic evaluations.

Adult↗
PubMed1998

Trauma pervasively elevates Brief Symptom Inventory profiles in inpatient women.

The Brief Symptom Inventory was administered to 228 women (M age: 37) consecutively admitted to specialized inpatient treatment for trauma-related disorders. Subsamples of patients were administered different posttraumatic stress disorder scales, the Impact of Events Scale-Revised, the Posttraumatic Stress Diagnostic Scale, and the PTSD scale of the Millon Clinical Multiaxial Inventory-III, as well as a measure of child abuse and neglect, the Childhood Trauma Questionnaire. In this severely traumatized group, every scale of the Brief Symptom Inventory was significantly more elevated than the inpatient female norms, with the five most highly elevated scales being Depression, Obsessive-Compulsive, Anxiety, Interpersonal Sensitivity, and Psychoticism. Different indicators of trauma (Childhood Trauma Questionnaire, PTSD scales, and PTSD diagnosis) show different patterns of relationships with the individual scales of the Brief Symptom Inventory. There is no simple relationship between trauma and BSI symptoms, but clinicians should consider severe interpersonal trauma to be one pathway to pervasively elevated profiles of the Brief Symptom Inventory.

Adult↗
PubMed1998

What do adult attachment scales measure?

Research suggests that attachment patterns can be measured as early as 12 months of age and that in the absence of major environmental change, they persist into adulthood. Evolving from three traditions, a number of assessment tools have been developed to study adult attachment. They range from semiclinical interviews to brief questionnaires and explore different relationship domains, from retrospective accounts of childhood experience to current romantic relationships. After exploring the theoretical background of the study of adult attachment, the authors review the format and the psychometric properties of several measures. Studies that compare measures are described. The article concludes with a discussion of unresolved questions about adult attachment that emerge from various measurement perspectives.

Adult↗
PubMed1997

A splice-site mutation causing ovine McArdle's disease.

McArdle's disease is an autosomal recessive myopathy with symptoms of exercise intolerance caused by deficiency of the enzyme muscle glycogen phosphorylase which releases glucose for contraction during exercise. The human cDNA has been sequenced and disease-causing mutations identified. An ovine equivalent of McArdle's disease has been diagnosed and the mutation responsible identified by PCR-amplification of the ovine glycogen myophosphorylase cDNA in six overlapping fragments followed by single strand conformation polymorphism (SSCP) analysis. Two fragments showed SSCPs in the glycogen myophosphorylase cDNA from affected sheep. The SSCP in fragment one was a silent polymorphism, while that in fragment six, was an eight base deletion at the 5' end of exon 20. This deletion will cause a frame-shift, a premature stop codon and remove the last 31 amino-acid residues from the protein. The cDNA deletion suggested that the genomic mutation most likely involved a splice-site. Sequencing intron 19 identified the mutation as an adenine for guanine substitution at the intron 19 3' splice-site. This eliminated an XbaI site present in normal sheep allowing diagnosis of normal, affected and carrier sheep. This ovine model of McArdle's disease is now available for therapeutic trials.

Amino Acid Sequence↗
PubMed1997

Effectiveness of alpha-tocopherol and selenium supplements in preventing lupinosis-associated myopathy in sheep.

OBJECTIVE: To compare the effectiveness of combined selenium and alpha-tocopherol acetate treatments in preventing lupinosis-associated myopathy in sheep. DESIGN: Measurement of plasma muscle and liver enzymes, and histopathological examination of muscle and liver in the treatment groups. PROCEDURE: The treatments were: subcutaneous injections of selenomethionine and vitamin E (sc(SeM+E)), an intraruminal selenium pellet and oral doses of vitamin E and intramuscular injections of selenomethionine combined with either oral doses of vitamin E (imSeM+orE) or intramuscular injections of vitamin E in an oily carrier. Another group received no supplements, while a control group was given selenium pellets on day 0 and fortnightly oral doses of vitamin E from day 0 to 72. To produce lupinosis-associated myopathy, the sheep were fed a diet low in vitamin E and given repeated injections of a crude extract of Diaphorthe toxica. Groups sc(SeM+E) and imSeM+orE were stressed by dosing with protected polyunsaturated fatty acids from day 56 onwards. RESULTS: Lupinosis-associated myopathy was induced in all unsupplemented sheep. In these sheep the storage of Se increased and that of vitamin E decreased. The subcutaneous treatment was highly effective in preventing lupinosis-associated myopathy and also produced the highest vitamin E concentrations in plasma and liver. Supplemental vitamin E was more efficacious than supplemental Se. Concentrations of vitamin E in the livers of sheep given intramuscular vitamin E were higher than expected based on plasma concentrations. Oral doses of vitamin E proved the least effective method of increasing concentrations in liver. Lupinosis did not affect Se concentrations in liver or muscle. CONCLUSION: The sc(SeM+E) treatment is highly effective in preventing lupinosis-associated myopathy but needs to be further assessed when selenium and vitamin E are both limiting in the diet.

Administration, Oral↗
PubMed1997

A psychoeducational program for patients with trauma-related disorders.

The authors describe the development and implementation of a psychoeducational program for patients with a wide range of trauma-related symptoms and disorders. The psychoeducational intervention is designed to facilitate coping, promote self-understanding, and enhance reflectiveness. Using attachment theory as the overarching conceptual framework, the authors educate patients about the nature of trauma, the effects of trauma on development, trauma-related psychiatric disorders, and a range of treatment approaches to trauma. They describe groups for adult inpatients and adults in partial hospital treatment, and for adolescents in either inpatient, residential, or outpatient treatment.

Adolescent↗
PubMed1996

The laryngeal mask airway for thyroid and parathyroid surgery.

The rôle of the laryngeal mask airway for thyroid and parathyroid surgery was studied in 97 consecutive patients. In 50% the technique combined electrical stimulation of the recurrent laryngeal nerve with visualisation of vocal cord movement via a fibreoptic bronchoscope. Stimulation was required in 10% to assist in identifying recurrent laryngeal nerve position during difficult surgical dissection. In the remaining 40% stimulation was used to confirm nerve integrity and for teaching purposes. Tracheal intubation was required for seven patients but in only two of these was intubation unplanned. The incidence of postoperative recurrent laryngeal nerve dysfunction was zero. These data suggest that the technique offers a safe alternative in airway management and may provide advantages in terms of preservation of recurrent laryngeal nerve function.

Electric Stimulation↗
PubMed1995

Dissociation and vulnerability to psychotic experience. The Dissociative Experiences Scale and the MMPI-2.

Prior research on the MMPI has cautioned against misdiagnosing schizophrenia in patients with dissociative identity disorder. The present study examined the full spectrum of the dissociative experience in relation to MMPI-2 profiles. Ninety-eight women in treatment for trauma-related disorders completed the Dissociative Experiences Scale and the MMPI-2 in routine inpatient diagnostic evaluations. Consistent with prior research, severe dissociation was associated with high elevations on MMPI-2 scales typically associated with psychotic symptoms. Contrary to hypotheses, the ostensibly most benign form of dissociation, absorption and imaginative involvement, was somewhat more strongly related to MMPI-2 scores than the more pathognomonic forms of dissociation, depersonalization and amnesia. Although it should not be misdiagnosed, severe impairment on the MMPI in conjunction with dissociation should be taken seriously as suggesting vulnerability to psychotic experience. The dissociative retreat from the stressors of outer reality opens the door to the inner world of traumatic images and affects, along with compromised reality testing and disorganized thinking.

Adult↗
PubMed1994

Plasma indicators of muscle damage in a model of nutritional myopathy in weaner sheep.

Subclinical nutritional myopathy was induced in 5-month-old sheep by feeding them a diet low in vitamin E and selenium. Subsequently clinical myopathy was induced by dosing with protected polyunsaturated fatty acids. Plasma activities of creatine kinase (CK), pyruvate kinase, aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase and aldolase, enzymes of muscle origin, all remained above their reference ranges in clinically affected sheep, but fluctuated widely. Similar fluctuations occurred in subclinically affected animals, resulting in some activities being within the reference ranges and some above, at different times. Plasma malondialdehyde, an indicator of lipid peroxidation, proved of no diagnostic value. Terminal plasma CK activities were significantly correlated with microscopic damage in the vastus lateralis (VL), but not the vastus intermedius (VI) or the tensor fascia lata (TFL) muscles. AST was the most highly correlated with damage in VI and VL. In two clinically affected sheep successfully treated with an oral dose of alpha-tocopherol acetate all enzymes decreased steadily to within their reference ranges, at rates probably related to their plasma half-lives. These results suggest that measurement of plasma CK activity would be useful in monitoring recovery of treated sheep.

Animals↗
PubMed1994

Muscle enzymes in the diagnosis of ovine weaner nutritional myopathy.

The diagnostic performance of plasma tests for muscle enzymes was measured in sheep from flocks affected by clinical and sub-clinical nutritional myopathy. Parallel combinations of tests for creatine kinase (CK), alanine amino transferase (ALT), aspartate amino transferase (AST) and lactate dehydrogenase had higher diagnostic sensitivity than CK alone. The enzymes ALT and AST showed the highest correlation with the degree of muscle damage. A parallel combination of tests for plasma CK and ALT as well as tests for plasma alpha-tocopherol and red cell glutathione peroxidase are recommended for the diagnosis of nutritional myopathy and a decision on the appropriate treatment. The number of false negative results based on a diagnosis from the microscopic examination of single muscles was higher than for the parallel combination of tests. The number of false negatives was highest for the vastus intermedius and lowest for the tensor fascia lata. Diagnosis using a panel of blood tests has the advantages of overcoming problems of inadequate muscle sampling, a larger number of sheep in the flock can be tested and a more rapid diagnosis can be obtained.

Alanine Transaminase↗