Common marmosets (Callithrix jacchus) with a right-hand preference displayed shorter latencies to enter a novel room containing novel structures and objects, touched more objects, and performed more touches and more parallax movements than marmosets with a left-hand preference. These results are consistent with specialization of the right hemisphere (left hand) for fear and negative emotional states and specialization of the left hemisphere (right hand) for approach and positive emotional states. There were no effects of age or sex on any of these behaviors. This relationship between exploration and hand preference did not occur when the marmosets were tested in the home cage with a novel problem, although significant effects of both age and dominance were found in solving the problem.

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It is now 20 years since the Portage Home Teaching model of early intervention was introduced into the UK. In this paper, an overview of the Portage Model and rationale is provided, achievements over the past two decades are noted and related research and evaluation studies are reviewed. A number of areas for future development are also highlighted. These include: issues of quality control; the multi-cultural dimension of Portage; multi-agency collaboration; professional training needs of Portage personnel; and influencing central government policy relating to families who have a young child with special needs.

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We have shown that a single i.v. dose of tenoxicam 20 mg, after thoracotomy, when compared with placebo in 20 patients (with one exclusion), was associated with a reduction in consumption of papaveretum, assessed by patient-controlled analgesia, of 2.2 mg h-1 (22%) to 4 h and 1.4 mg h-1 (23%) to 12 h after operation (repeated measures analysis of variance: P less than 0.01). There was no reduction from 12 to 24 h. There was no significant difference between groups in pain scores or in side effects.