Cocaine addiction disorder is notably aggravated by concomitant cognitive and emotional pathology that impedes recovery. We studied whether a persistent cognitive/emotional dysregulation in mice withdrawn from cocaine holds a neurobiological correlate within the hippocampus, a limbic region with a key role in anxiety and memory but that has been scarcely investigated in cocaine addiction research. Mice were submitted to a chronic cocaine (20 mg/kg/day for 12 days) or vehicle treatment followed by 44 drug-free days. Some mice were then assessed on a battery of emotional (elevated plus-maze, light/dark box, open field, forced swimming) and cognitive (object and place recognition memory, cocaine-induced conditioned place preference, continuous spontaneous alternation) behavioral tests, while other mice remained in their home cage. Relevant hippocampal features [basal c-Fos activity, GABA+, parvalbumin (PV)+ and neuropeptide Y (NPY)+ interneurons and adult neurogenesis (cell proliferation and immature neurons)] were immunohistochemically assessed 73 days after the chronic cocaine or vehicle protocol. The cocaine-withdrawn mice showed no remarkable exploratory or emotional alterations but were consistently impaired in all the cognitive tasks. All the cocaine-withdrawn groups, independent of whether they were submitted to behavioral assessment or not, showed enhanced basal c-Fos expression and an increased number of GABA+ cells in the dentate gyrus. Moreover, the cocaine-withdrawn mice previously submitted to behavioral training displayed a blunted experience-dependent regulation of PV+ and NPY+ neurons in the dentate gyrus, and neurogenesis in the hippocampus. Results highlight the importance of hippocampal neuroplasticity for the ingrained cognitive deficits present during chronic cocaine withdrawal.
Resumen En Medicina es clave “ofrecer el 100% de lo que se precisa y evitar el 100% de lo que no se precisa”. Lamentablemente, es difícil cumplir con esta cuestión clave y generalmente se ofrece más de lo que se precisa y no se evita todo lo que no se precisa. Este texto es una revisión no sistemática con objetivo docente en que se revisa el problema general en atención primaria y se proponen formas de evitar los excesos y defectos respecto a intervenciones preventivas, diagnósticas, terapéuticas y de rehabilitación. Saber no hacer es ciencia y arte que se enseña poco y se practica menos. Los excesos que dañan son parte casi diaria de la práctica clínica, en prevención, diagnóstico, tratamiento y rehabilitación. Es imprescindible fomentar “el arte y la ciencia de no hacer”.
Context: Despite evidence demonstrating the benefits of understanding patients, there is a paucity of information about how physicians address psychological and social concerns of patients. No one study has been published about the incidence of crying in General/Family Practice. Objective: To know the incidence of crying in primary care/general practice, and the patients’ characteristics, their reasons for encounter and their health problems. Design: A descriptive, prospective study, of one year, of three general practitioners/family physicians in Madrid, Spain. Setting: primary care (doctors’ office and patients’ home). Subjects: Face to face encounters with crying patients. Main outcome measure: At least one rolling tear. Results: Patients cried in 157 encounters out of a total of 18,627 giving an incidence rate of 8.4 per thousand. More frequent reasons for encounters were: feeling depressed (12.7%), social handicap (mainly social isolation/living alone) (6.4%), relationship problem with partner (5.1%) and feeling anxious (3.2%). More frequent health problems were: depressive disorder (23.6%), anxiety disorder (8.3%), cerebrovascular disease (5.1%) and loss/death of partner (3.8%). Conclusions: Crying in primary care is not uncommon. Reasons for crying cover the whole range of human problems, mainly social and psychological problems.
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