The implications of Project 2000 and the formation of links with higher education for the professional and academic needs of nurse teachers in the United Kingdom

A national study was conducted between 1991 and 1994 to explore and describe the changing role of the nurse teacher following the introduction of Project 2000 pre-registration nursing courses. Multiple methods were used to collect data from a wide variety of respondents (nurse teachers, midwife teachers, clinical nurses, health service managers and higher education lecturers). This paper presents the findings relating to the impact of Project 2000 and the move into higher education on the continuing educational needs of nurse teachers. Views on college strategies for staff development, the changing nature of teachers'academic and professional development needs and the problems of the conflicting demands experienced are reported. The research highlights the need for clinical credibility to be clearly defined in relation to nurse teachers and for educational institutions to place more emphasis on teachers'clinical development if the rhetoric of policy is to become a reality.     

An unusual clinical presentation of bilateral schizencephaly

Summary We present a case with a characteristic magnetic resonance image (MRI) of bilateral open-lipped schizencephaly and atypical clinical presentation. The patient is still alive and in good health in her forties, she has never presented seizures, and although the motor dysfunction is well correlated with cerebral lobe involvement, neurobehavioral dysfunction is not proportional to the MR image of the cerebral malformation.

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Un cas inhabituel de schizencéphalie bilatérale

Résumé Nous présentons un cas de schizencéphalie bilatérale ouverte caractérisé par une présentation clinique atypique et une imagerie par résonance magnétique nucléaire caractéristique. La patiente est encore vivante, en bonne santé, à plus de 40 ans, elle n'a jamais présenté de crise comitiale et, bien que les troubles moteurs soient bien corrélés aux altérations cérébrales, les troubles neuro-comportementaux ne sont pas proportionnels aux images IRM de cette malformation cérébrale.

     

Lassa virus hepatitis. Observations on a fatal case from the 1972 Sierra Leone epidemic.

During a recent outbreak of Lassa fever in Sierre Leone, a 20-year-old woman developed an acute febrile disease with tonsillar exudates and hemorrhagic manifestations. Lassa virus was isolated in cell cultures from pharyngeal secretions and pleural fluid and was identified by complement fixation. Typical arenavirus particles were observed in these infected cell cultures. In a liver biopsy specimen, diffuse hepatocellular damage and focal necroses were evident, with a spectrum of liver cell change, ranging from slight vacuolizaiton to frank lysis. Virus was frequently observed in nearby extracellular spaces and was clearly associated with hepatocytes rather than sinusoidal cells. The demonstration for the first time of Lassa virus particules in human tissue provides direct evidence that the virus is responsible for the observed pathologic changes.     

Online measurement of ocular accommodation using a low-cost microcomputer system

The paper describes a low-cost system for the measurement of ocular accommodation. Digitisation of the low-frequency signals obtained from the measurement is straightforward and high-speed methods are not necessary. The methods described are, therefore, of interest to workers involved in the study of low-frequency signals, which are common in biological systems.     

Damaged chromatin does not prevent the exit from metaphase I in fused mouse oocytes

The presence of checkpoint mechanisms which are able to recognize damaged chromatin and thereafter to prevent exit from metaphase I has been investigated in giant mouse oocytes produced by fusion of a normal metaphase I oocyte with an equivalent oocyte with damaged chromatin. The presence of damaged chromatin did not prevent the onset of anaphase I in both sets of chromatin in the fused cells. Interestingly, fused or unfused cells containing only damaged chromatin failed to enter anaphase and persisted instead in a metaphase-like state. These results demonstrate the fragility of checkpoint controls in mammalian female germ cells.      

Respiratory effects in two-dimensional Fourier transform MR imaging

Respiratory and other regular motions during two-dimensional Fourier transform magnetic resonance imaging produce image artifacts consisting of local blurring and more or less regularly spaced "ghost" images propagating along the direction of the phase-encoding magnetic field gradient. The patterns of these ghost artifacts can be understood in terms of the technique of image production and basic properties of the discrete Fourier transform. This understanding permits, without respiratory gating, production of images of improved quality in body regions in which there is significant respiratory motion. In particular, the ghosts can be maximally separated from the primary image by choosing intervals between phase-encoding gradient pulse increments that are equal to one-half the respiratory period; they can be minimally separated by choosing an interval equal to the respiratory period. Increasing the number of signal averages between each phase-encoding increment decreases the intensity of the ghosts.     

Excitotoxic lesions of the pedunculopontine tegmental nucleus disinhibit orofacial behaviours stimulated by microinjections of d-amphetamine into rat ventrolateral caudate-putamen

Data are presented which support the hypothesis that the pedunculopontine tegmental nucleus serves as an output station for the striatum and, in particular, has a role in the expression of behaviour stimulated from the ventrolateral caudate-putamen, a rodent homologue of the primate putamen. Rats received either bilateral ibotenate or sham lesions in the pedunculopontine tegmental nucleus and bilateral cannulation of the ventrolateral caudate-putamen. Oral motor activities were observed following microinjection of 5.0, 10.0 and 20.0 g d-amphetamine (and vehicle-only control) into the ventrolateral caudate-putamen. As expected, orofacial behaviours such as biting and licking were observed in sham-lesioned rats following this treatment, but pedunculopontine tegmental nucleus-lesioned rats exhibited an increase in the incidence of these oral motor behaviours at all doses of amphetamine compared with the controls. This increase was the product of changes in the duration and number of times in which they engaged in oral motor behaviours, but not the latency to initiate them. There was no change in the normal oral motor activities associated with grooming. Histological analysis showed that ibotenate lesions destroyed both cholinergic and non-cholinergic neurones in the pedunculopontine tegmental nucleus. These data indicate that loss of the pedunculopontine tegmental nucleus disinhibits oral motor behaviours stimulated from the ventrolateral caudateputamen by d-amphetamine and are discussed in terms of their implications for understanding the relationships between striatal outflow and structures in the pons.     

Presynaptic modulation of dopamine-induced locomotor activity by oxotremorine in nucleus accumbens of the rat

Summary Behavioural studies were carried out to determine whether central cholinergic mechanisms regulate dopaminergic activity by presynaptic mechanisms as suggested by recentin vitro studies. Bilateral injections of a muscarinic receptor agonist, oxotremorine (4g), into the nucleus accumbens were found to enhance dopamine-induced locomotor activity. In rats deprived of presynaptic terminals by pretreatment with intraaccumbens injections of 6-hydroxydopamine, oxotremorine did not enhance dopamine-induced locomotor activity but on the contrary produced a marked reduction of locomotor activity. Although dopamine induced locomotor activity could occur in 6-hydroxydopamine treated animals, the muscarinic regulation was dependent on the presence of the intact dopamine terminal and hence a presynaptic receptor may be involved.