High-resolution mapping of injury-site dependent functional recovery in a single axon in zebrafish.

In non-mammalian vertebrates, some neurons can regenerate after spinal cord injury. One of these, the giant Mauthner (M-) neuron shows a uniquely direct link to a robust survival-critical escape behavior but appears to regenerate poorly. Here we use two-photon microscopy in parallel with behavioral assays in zebrafish to show that the M-axon can regenerate very rapidly and that the recovery of functionality lags by just days.

[Prinzmetal's angor. Apropos of 4 cases. Review of the literature].

In the light of 4 personal observations of PPPRINZMETAL's angina, a review has been conducted of the literature in the 15 years since the condition was first described. Although the formal diagnostic criteria for this form of angina simultaneously clinical, biological and electrical - anginal attacks occurring at rest, often at night, during which elevation of the ST segment is recorded which disappears at the end of the attack without any significant rise in enzyme levels (SGOT and CPK) - the frontiers of the syndrome appear to have widened since PRINZMETAL's description: - Severe proximal stenosis of the coronary arteries is not obligatory; they may be only slightly damaged or even healthy. - Prinzmetal's angina is by no means always "spontaneous" but is often induced, either by psychic factors, which explain the fixed time of the attacks, or by organic factors, e.

[Form and development of the human fetal subarachnoid cistern].

The development and form of the human fetal subarachnoid spaces have been elucidated by reconstruction (34 mm CRL fetus) and by plastic casts (several 20-30 cm CRL fetuses). Equivalents of adult cisterns are present in the young fetus. In older fetuses the cisternal shape is of adult type.