Several neuronal and axonal types form long intrinsic connections in the cat primary auditory cortical field (AI).

Intrinsic connections in the cat primary auditory field (AI) as revealed by injections of Phaseolus vulgaris leucoagglutinin (PHA-L) or biocytin, had an anisotropic and patchy distribution. Neurons, labelled retrogradely with PHA-L were concentrated along a dorsoventral stripe through the injection site and rostral to it; the spread of rostrally located neurons was greater after injections into regions of low rather than high characteristic frequencies. The intensity of retrograde labelling varied from weak and granular to very strong and Golgi-like. Out of 313 Golgi like retrogradely labelled neurons 79.6% were pyramidal, 17.2% multipolar, 2.6% bipolar, and 0.6% bitufted; 13.4% were putatively inhibitory, i.e. aspiny or sparsely spiny multipolar, or bitufted. Individual anterogradely labelled intrinsic axons were reconstructed for distances of 2 to 7 mm. Five main types were distinguished on the basis of the branching pattern and the location of synaptic specialisations. Type 1 axons travelled horizontally within layers II to VI and sent collaterals at regular intervals; boutons were only present in the terminal arborizations of these collaterals. Type 2 axons also travelled horizontally within layers II to VI and had rather short and thin collateral branches; boutons or spine-like protrusions occurred in most parts of the axon. Type 3 axons travelled obliquely through the cortex and formed a single terminal arborization, the only site where boutons were found. Type 4 axons travelled for some distance in layer I; they formed a heterogeneous group as to their collaterals and synaptic specializations. Type 5 axons travelled at the interface between layer VI and the white matter; boutons en passant, spine-like protrusions, and thin short branches with boutons en passant were frequent all along their trajectory. Thus, only some axonal types sustain the patchy pattern of intrinsic connectivity, whereas others are involved in a more diffuse connectivity.

La capacité de travail dans les expertises des centres d'observation médicale AI : distribution, précision, concordance.

[Table des matières] Résumé. Zusammenfassung. 1. Introduction. 2. Objectifs. 3. Méthodologie. 4. Résultats. 4.1. Population analysée. 4.2. Distribution de la capacité de travail. 4.3. Précision de la capacité de travail. 4.4. Concordance entre texte de l'expertise et feuille statistique. 4.5. Concordance entre degré d'activité et capacité de travail actuelle. 4.6. Dynamique de la capacité de travail. 4.7. Caractère de la décision. 5. Discussion. 6. Conclusions et recommandations. 7. Bibliographie. 8. Annexes (1-3).

"Docteur, j'ai mal et des fourmis dans les jambes le soir..." [Doctor, I have pain and pins and needles in my legs at night].

Restless legs syndrome (RLS) is a frequent chronic condition. It causes discomfort in the lower limbs with an urge to move the legs and sometimes paresthesias. It's frequently associated with sleep and mood disorders causing a significant impact on quality of life. There are four clinical criteria to diagnose it. Treatment includes management of reversible factors and if needed symptomatic treatment. Depending on symptoms severity, non-drug measures can be tried. First-line medication treatment should be dopaminergic agonists. Second-line treatments include, anticonvulsivants (gabapentine), benzodiazepine (clonazepam) or opioids based on predominant symptoms. Difficult cases should be referred to a specialist.