Childhood abuse is linked to posttraumatic stress disorder (PTSD), which follows abuse survivors into adulthood. This study identified the neuropsychological and neuromorphological sequelae of PTSD among prepubescently abused women. Right-handed women aged 20-40 years were placed into PTSD and abuse, abuse only, and normal control groups (n = 17 per group). Participants were screened for trauma history and psychiatric symptoms, demographically matched, and given neuropsychological tests and a magnetic resonance scan of their brain. Women with PTSD did not express significant deficits in memory performance or hippocampal volume when compared with the abuse and normal control groups.

The myriad of symptoms from which many POTS patients suffer is associated with a decreased quality of life. Nearly half of our sample with POTS was at high risk for suicide. More work needs to be done to determine the underlying issues surrounding suicide in POTS so that an appropriate treatment regimen can be developed.

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The relationships among the severity of childhood abuse and neglect, posttraumatic stress disorder (PTSD), and adult obesity were investigated. 207 women (M age = 26.5 yr., SD = 6.7) completed the Childhood Trauma Questionnaire, Millon Clinician Multiaxial Inventory, and a demographic questionnaire. Analyses of variance indicated that women who reported moderate-to-extreme emotional neglect (n = 71) had significantly higher PTSD scores and increased BMI compared to women who reported low emotional neglect (n = 84). Women who reported severe sexual or emotional abuse also had higher PTSD scores, but no relationship was found with BMI when other factors were controlled. Although PTSD scores and self-reported severity of childhood emotional neglect were strongly correlated (r = .61, p < .001), PTSD was not found to be a mediating factor in obesity in women who reported childhood emotional neglect, although depression was.

To investigate striatal mechanisms underlying the acute effects of stimulants on motor behavior, firing rates (FRs) of striatal neurons related specifically to vertical head movement were studied exclusively during vertical head movements. Precocaine FRs were recorded after intraperitoneal saline injection (time 1; T1), and rats performed conditioned vertical head movements (Ͼ10,000) similar to those induced by stimulants. After cocaine injection (0, 5, 10, or 20 mg/kg; T2), animals continued in the task. The proportion of long head movements was increased by low doses but decreased by the high dose, which induced stereotypic head movements. Comparing each neuron's FR during movements that were matched between T1 and T2 (e.g., regarding direction, distance), cocaine's effects depended on predrug FR and dose. Plots regressing T2FR on T1FR showed dose-dependent, "clockwise" rotations of regression lines in plots of all the neurons' average FRs and of individual neurons' FRs during different movements. All three doses elevated normally low FRs; the high dose also suppressed many higher FRs. Enhancement of a neuron's FR associated with weak and suppression of FR associated with strong corticostriatal inputs contradict several current theories of dopamine (DA) function. Induction of stereotypy by a single, high-dose injection suggests that this cocaine level exceeded that in other studies using cocaine self-administration, in which stereotypy develops only after several sessions. Suppressive effects observed only at the high dose and in numerous electrophysiological studies of DA agonist effects may be unrepresentative of uniform elevations in lateral striatal firing related to movement observed at lower cocaine levels.Effects of psychostimulants include increased rates of grooming, social activity, rearing, and locomotion at low doses; increased rates of locomotion and rearing at the expense of feeding, grooming, and social activity at moderate doses; whereas complex movements are replaced by short, repetitive, apparently purposeless movements, termed stereotypy, such as head bobbing at high doses (Lyon and Robbins, 1975). Dopamine (DA) transmission in the lateral striatum plays a key role in psychostimulant-induced stereotypy (Creese and Iversen, 1974;Kelly et al., 1975), more so than non-DA monoamines (Fog and Pakkenberg, 1971;Creese and Iversen, 1974). DA agonists in the lateral, but not medial, striatum cause stereotypy (Kelley and Delfs, 1994). DA antagonists or 6-hydroxydopamine lesions of striatal DA attenuate psychostimulant-induced stereotypy (Kelly et al., 1975).Glutamatergic projections from somatic sensorimotor cortices converge in dorsolateral striatum (DLS) (Kü nzle, 1975;McGeorge and Faull, 1989). Striatal medium spiny neurons (MSNs) fire in relation to sensorimotor activity of particular body parts (Crutcher and DeLong, 1984;Carelli and West, 1991) and project via pallidum and substantia nigra pars reticulata to thalamocortical premotor areas (Parent and Hazrati, 1995). The convergence onto M...