scholarly journals Preclinical Modeling of Exposure to a Global Marine Bio-Contaminant: Effects of In Utero Domoic Acid Exposure on Neonatal Behavior and Infant Memory

2018 ◽  
Author(s):  
Kimberly S. Grant ◽  
Brenda Crouthamel ◽  
Caroline Kenney ◽  
Noelle McKain ◽  
Rebekah Petroff ◽  
...  
Keyword(s):  
Recognition Memory ◽  
Domoic Acid ◽  
Visual Recognition ◽  
Daily Intake ◽  
Daily Basis ◽  
Preclinical Study ◽  
Public Health Issue ◽  
Test Problems ◽  
Significant Impairment ◽  
Infant Memory

AbstractDomoic Acid (DA) is a naturally-occurring marine neurotoxin that is increasingly recognized as an important public health issue. Prenatal DA exposure occurs through the maternal consumption of contaminated shellfish/finfish. To better understand the fetal risks associated with DA, we initiated a longitudinal, preclinical study focused on the reproductive and developmental effects of chronic, low-dose oral DA exposure. To this end, 32 adult female Macaca fascicularis monkeys were orally dosed with 0, 0.075 or 0.15 mg/kg/day DA on a daily basis prior to breeding and throughout breeding and pregnancy. The doses included the proposed human Tolerable Daily Intake (TDI) (0.075 mg/kg/day) for DA. Adult females were bred to nonexposed males. To evaluate development during early infancy, offspring were administered a Neonatal Assessment modeled after the human Neonatal Behavior Assessment Scale and a series of Visual Recognition Memory problems using the novelty paradigm. Results indicated that prenatal DA exposure did not impact early survival reflexes or responsivity to the environment. Findings from the recognition memory assessment, given between 1-2 months of age, showed that exposed and control infants demonstrated robust novelty scores when test problems were relatively easy to solve. Performance was not diminished by the introduction of delay periods. However, when more difficult recognition problems were introduced, the looking behavior of the 0.15 mg/kg DA group was random and infants failed to show differential visual attention to novel test stimuli. This finding suggests subtle but significant impairment in recognition memory and demonstrates that chronic fetal exposure to DA may impact developing cognitive processes.

The presence of semantic content in a visual recognition memory task reduces the severity of neglect

2021 ◽  
Vol 157 ◽  
pp. 107860
Author(s):  
Elior Moreh ◽  
Ehud Zohary ◽  
Tanya Orlov
Keyword(s):  
Recognition Memory ◽  
Visual Recognition ◽  
Memory Task ◽  
Semantic Content ◽  
Recognition Memory Task ◽  
Visual Recognition Memory

Excitotoxic lesions of the rhinal cortex in the baboon differentially affect visual recognition memory, habit memory and spatial executive functions

2002 ◽  
Vol 15 (7) ◽  
pp. 1225-1236 ◽  
Author(s):  
C. Chavoix ◽  
X. Blaizot ◽  
K. Meguro ◽  
B. Landeau ◽  
J.C. Baron
Keyword(s):  
Recognition Memory ◽  
Executive Functions ◽  
Visual Recognition ◽  
Visual Recognition Memory ◽  
Rhinal Cortex

Development of flexible visual recognition memory in human infants

2004 ◽  
Vol 7 (5) ◽  
pp. 527-533 ◽  
Author(s):  
Astri J. Robinson ◽  
Olivier Pascalis
Keyword(s):  
Recognition Memory ◽  
Visual Recognition ◽  
Human Infants ◽  
Visual Recognition Memory

Neurotoxic lesions of perirhinal cortex impair visual recognition memory in rhesus monkeys

Neuroreport ◽  
2001 ◽  
Vol 12 (9) ◽  
pp. 1913-1917 ◽  
Author(s):  
Ludisue M??lkov?? ◽  
Jocelyne Bachevalier ◽  
Mortimer Mishkin ◽  
Richard C. Saunders
Keyword(s):  
Recognition Memory ◽  
Rhesus Monkeys ◽  
Visual Recognition ◽  
Perirhinal Cortex ◽  
Visual Recognition Memory ◽  
Neurotoxic Lesions

Visual recognition memory and developmental outcomes of cocaine-exposed and non-exposed infants

1998 ◽  
Vol 21 ◽  
pp. 687
Author(s):  
Lynn T. Singer ◽  
Robert Arendt ◽  
Sonia Minnes ◽  
Ann Salvator ◽  
Joanne Robinson ◽  
...  
Keyword(s):  
Recognition Memory ◽  
Visual Recognition ◽  
Developmental Outcomes ◽  
Visual Recognition Memory

Prediction and network modelling of self-harm through daily self-report and history of self-injury

2020 ◽  
pp. 1-11 ◽  
Author(s):  
Michael J. Kyron ◽  
Geoff R. Hooke ◽  
Andrew C. Page
Keyword(s):  
Risk Factors ◽  
Psychological Distress ◽  
Daily Basis ◽  
Adverse Outcomes ◽  
Self Report ◽  
Public Health Issue ◽  
Short Term ◽  
Wish To Die ◽  
History Of ◽  
Self Harm

Abstract Background Self-harm is a significant public health issue, and both our understanding and ability to predict adverse outcomes are currently inadequate. The current study explores how preventative efforts could be aided through short-term prediction and modelling of risk factors for self-harm. Methods Patients (72% female, Mage = 40.3 years) within an inpatient psychiatric facility self-reported their psychological distress, interpersonal circumstances, and wish to live and die on a daily basis during 3690 unique admissions. Hierarchical logistic regressions assessed whether daily changes in self-report and history of self-harm could predict self-harm, with machine learning used to train and test the model. To assess interrelationships between predictors, network and cross-lagged panel models were performed. Results Increases in a wish to die (β = 1.34) and psychological distress (β = 1.07) on a daily basis were associated with increased rates of self-harm, while a wish to die on the day prior [odds ratio (OR) 3.02] and a history of self-harm (OR 3.02) was also associated with self-harm. The model detected 77.7% of self-harm incidents (positive predictive value = 26.6%, specificity = 79.1%). Psychological distress, wish to live and die, and interpersonal factors were reciprocally related over the prior day. Conclusions Short-term fluctuations in self-reported mental health may provide an indication of when an individual is at-risk of self-harm. Routine monitoring may provide useful feedback to clinical staff to reduce risk of self-harm. Modifiable risk factors identified in the current study may be targeted during interventions to minimise risk of self-harm.

Mnemonic firing of neurons in the monkey temporal pole during a visual recognition memory task

1995 ◽  
Vol 74 (1) ◽  
pp. 162-178 ◽  
Author(s):  
K. Nakamura ◽  
K. Kubota
Keyword(s):  
Recognition Memory ◽  
Visual Information ◽  
Visual Recognition ◽  
Discharge Rate ◽  
Memory Task ◽  
Delay Period ◽  
Recognition Memory Task ◽  
Visual Response ◽  
Visual Recognition Memory ◽  
Temporal Pole

1. We examined single-neuronal activity in the temporal pole of monkeys, including the anterior ventromedial temporal (VMT) cortex (the temporopolar cortex, area 36, area 35, and the entorhinal cortex) and the anterior inferotemporal (IT) cortex, during a visual recognition memory task. In the task, a trial began when the monkey pressed a lever. After a waiting period, a visual sample stimulus (S) was presented one to four times on a monitor with an interstimulus delay. Thereafter, a new stimulus (R) was presented. The monkeys were trained to remember S during the delay period and to release the lever in response to R. Colored photographs of natural objects were used as visual stimuli. 2. About 70% of the recorded neurons (225 of 311) responded to at least one of the Ss tested. Thirty percent of these neurons (68 of 225) continued to fire during the subsequent delay periods. In 75% of these neurons (51 of 68), the firing during the delay period strongly correlated with the response to S. 3. The discharge rate during the delay period did not correlate with the monkey's eye movements, pressing or releasing of the lever, or the reaction time. 4. If the monkey erroneously released the lever in response to S or during the delay period, the firing disappeared after the erroneous lever release. If the monkey failed to release the lever in response to R, the firing persisted even after R was withdrawn. The discharge rate in incorrect trials was comparable with that in correct trials. The neurons were considered to fire for as long as the memory of S was necessary. 5. Firing persisted even when an achromatic version or half (even a portion) of S was presented, indicating that the color, a particular portion, or the entire shape of S was not always necessary to elicit firing. 6. An S that elicited firing during the delay period invariably elicited a visual response. Neurons that fired during the delay period showed a higher stimulus selectivity than other visually responsive neurons in the anterior VMT cortex. Thus neurons that fire during the delay period represent a subgroup of visually responsive neurons that are selectively tuned to a certain stimulus. 7. More neurons fired during the delay period in the anterior VMT cortex than in the anterior IT cortex. 8. We conclude that firing during the delay period by neurons in the temporal pole reflects the short-term storage of visual information regarding a particular S.

Neurocognitive deficits in decision-making and planning of patients with DSM-III-R borderline personality disorder

2002 ◽  
Vol 32 (8) ◽  
pp. 1395-1405 ◽  
Author(s):  
E. BAZANIS ◽  
R. D. ROGERS ◽  
J. H. DOWSON ◽  
P. TAYLOR ◽  
C. MEUX ◽  
...  
Keyword(s):  
Decision Making ◽  
Borderline Personality Disorder ◽  
Personality Disorder ◽  
Recognition Memory ◽  
Frontal Lobe ◽  
Visual Recognition ◽  
Borderline Personality ◽  
Neurocognitive Deficits ◽  
Visual Recognition Memory ◽  
History Of

Background. Repeated, self-damaging behaviour occurring in the context of borderline personality disorder (BPD) may reflect impairments in decision-making and planning cognition. However, there has been no systematic neuropsychological examination of these particular cognitive functions in patients diagnosed with BPD. Such investigations may improve our understanding of the possible role of brain dysfunction in BPD and improve the characterization of the psychological difficulties associated with this disorder.Method. Forty-two psychiatric patients with a diagnosis of DSM-III-R BPD (41 of whom gave a history of self-harm), without a history of specified ‘psychoses’ or current major affective disorder, were clinically assessed before completing computerized tasks of decision-making and planning previously shown to be sensitive to frontal lobe dysfunction, and tests of spatial and pattern visual recognition memory previously shown to be sensitive to frontal lobe damage and temporal lobe damage respectively. The performance of the BPD patient group was compared with that of a non-clinical control group consisting of 42 subjects.Results. The performance of the BPD patients on the decision-making task was characterized by a pattern of delayed and maladaptive choices when choosing between competing actions, and by impulsive, disinhibited responding when gambling on the outcome of their decisions. BPD patients also showed impairments on the planning task. There was no evidence of impaired visual recognition memory. Additional analyses suggested only limited effects of current medication and history of previous substance use disorder.Conclusions. These findings suggest that BPD is associated with complex impairments in dissociable cognitive processes mediated by circuitry encompassing the frontal lobes. These impairments may mediate some of the behavioural changes evident in BPD. Further work is needed to examine the specificity of these findings.

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