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eyeblink conditioning

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https://www.readbyqxmd.com/read/29680227/cerebellar-transcranial-direct-current-stimulation-interacts-with-bdnf-val66met-in-motor-learning
#1
Rick van der Vliet, Zeb D Jonker, Suzanne C Louwen, Marco Heuvelman, Linda de Vreede, Gerard M Ribbers, Chris I De Zeeuw, Opher Donchin, Ruud W Selles, Jos N van der Geest, Maarten A Frens
BACKGROUND: Cerebellar transcranial direct current stimulation has been reported to enhance motor associative learning and motor adaptation, holding promise for clinical application in patients with movement disorders. However, behavioral benefits from cerebellar tDCS have been inconsistent. OBJECTIVE: Identifying determinants of treatment success is necessary. BDNF Val66Met is a candidate determinant, because the polymorphism is associated with motor skill learning and BDNF is thought to mediate tDCS effects...
April 11, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29662214/locomotor-activity-modulates-associative-learning-in-mouse-cerebellum
#2
Catarina Albergaria, N Tatiana Silva, Dominique L Pritchett, Megan R Carey
Changes in behavioral state can profoundly influence brain function. Here we show that behavioral state modulates performance in delay eyeblink conditioning, a cerebellum-dependent form of associative learning. Increased locomotor speed in head-fixed mice drove earlier onset of learning and trial-by-trial enhancement of learned responses that were dissociable from changes in arousal and independent of sensory modality. Eyelid responses evoked by optogenetic stimulation of mossy fiber inputs to the cerebellum, but not at sites downstream, were positively modulated by ongoing locomotion...
April 16, 2018: Nature Neuroscience
https://www.readbyqxmd.com/read/29660939/aberrant-cortical-event-related-potentials-during-associative-learning-in-rat-models-for-presymptomatic-stages-of-alzheimer-s-disease
#3
Bardia Nouriziabari, Susmita Sarkar, Stephanie E Tanninen, Robert D Dayton, Ronald L Klein, Kaori Takehara-Nishiuchi
Trace eyeblink conditioning is a hippocampus-dependent associative learning paradigm which is impaired in patients with Alzheimer's disease (AD) and animal AD models. Learning in this paradigm accompanies changes in oscillatory activity in forebrain regions, some of which are loci of pathogenic changes in prodromal AD stages. These observations motivated us to examine how cortical event-related potentials (ERPs) during this paradigm are affected by two features of the asymptomatic, AD-related brain abnormality, entorhinal tau accumulation and mild cholinergic deficit...
April 11, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29614377/neural-representations-of-time-linked-memory
#4
Maryna Pilkiw, Kaori Takehara-Nishiuchi
Many cognitive processes, such episodic memory and decision making, rely on the ability to form associations between two events that occur separately in time. The formation of such temporal associations depends on neural representations of three types of information: what has been presented (trace holding), what will follow (temporal expectation), and when the following event will occur (explicit timing). The present review seeks to link these representations with firing patterns of single neurons recorded while rodents and non-human primates associate stimuli, outcomes, and motor responses over time intervals...
March 31, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29578033/propranolol-produces-short-term-facilitation-of-extinction-in-a-rabbit-model-of-post-traumatic-stress-disorder
#5
Lauren B Burhans, Carrie A Smith-Bell, Bernard G Schreurs
Post-traumatic stress disorder (PTSD) is a learning-based anxiety disorder with significant public health challenges due to difficulties in treating the complex, multiple symptomology. We have developed an animal model of PTSD, based on Pavlovian eyeblink conditioning in rabbits, that addresses two key features: conditioned responses (CRs) to cues associated with an aversive event and a form of conditioned hyperarousal referred to as conditioning-specific reflex modification (CRM). We have found previously that unpaired extinction is ideal for reducing both CRs and CRM simultaneously and shows sensitivity to systemic serotonergic and glutamatergic manipulations...
March 22, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29524234/measuring-pavlovian-appetitive-conditioning-in-humans-with-the-postauricular-reflex
#6
Yoann Stussi, Sylvain Delplanque, Seline Coraj, Gilles Pourtois, David Sander
Despite its evolutionary and clinical significance, appetitive conditioning has been rarely investigated in humans. It has been proposed that this discrepancy might stem from the difficulty in finding suitable appetitive stimuli that elicit strong physiological responses. However, this might also be due to a possible lack of sensitivity of the psychophysiological measures commonly used to index human appetitive conditioning. Here, we investigated whether the postauricular reflex-a vestigial muscle microreflex that is potentiated by pleasant stimuli relative to neutral and unpleasant stimuli-may provide a valid psychophysiological indicator of appetitive conditioning in humans...
March 9, 2018: Psychophysiology
https://www.readbyqxmd.com/read/29492336/a-new-ica-based-fingerprint-method-for-the-automatic-removal-of-physiological-artifacts-from-eeg-recordings
#7
Gabriella Tamburro, Patrique Fiedler, David Stone, Jens Haueisen, Silvia Comani
Background: EEG may be affected by artefacts hindering the analysis of brain signals. Data-driven methods like independent component analysis (ICA) are successful approaches to remove artefacts from the EEG. However, the ICA-based methods developed so far are often affected by limitations, such as: the need for visual inspection of the separated independent components (subjectivity problem) and, in some cases, for the independent and simultaneous recording of the inspected artefacts to identify the artefactual independent components; a potentially heavy manipulation of the EEG signals; the use of linear classification methods; the use of simulated artefacts to validate the methods; no testing in dry electrode or high-density EEG datasets; applications limited to specific conditions and electrode layouts...
2018: PeerJ
https://www.readbyqxmd.com/read/29486267/the-distressed-type-d-personality-factor-of-social-inhibition-but-not-negative-affectivity-enhances-eyeblink-conditioning
#8
M T Allen, J D Handy, M R Blankenship, R J Servatius
Recent work has focused on a learning diathesis model in which specific personality factors such as behavioral inhibition (BI) may influence associative learning and in turn increase risk for the development of anxiety disorders. We have found in a series of studies that individuals self-reporting high levels of BI exhibit enhanced acquisition of conditioned eyeblinks. In the study reported here, hypotheses were extended to include distressed (Type D) personality which has been found to be related to BI. Type D personality is measured with the DS-14 scale which includes two subscales measuring negative affectivity (NA) and social inhibition (SI)...
February 24, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29407282/delayed-unpaired-extinction-as-a-treatment-for-hyperarousal-of-the-rabbit-nictitating-membrane-response-and-its-implications-for-treating-ptsd
#9
Bernard G Schreurs, Carrie A Smith-Bell, Lauren B Burhans
Treatment for PTSD (Post-traumatic stress disorder) is rarely available immediately after trauma and often delayed for weeks or months after an event. In a rabbit eyeblink conditioning model of PTSD, we have previously shown that presentations of a tone conditioned stimulus (CS) and shock unconditioned stimulus (US) in an explicitly unpaired manner known as unpaired extinction is effective in reducing CS responding and US hyperarousal even if shock intensity is reduced eight-fold and elicits only minimal responding...
January 12, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29384197/if-or-when-uncertainty-s-role-in-anxious-anticipation
#10
Ken P Bennett, Jacqueline S Dickmann, Christine L Larson
Uncertainty is often associated with subjective distress and a potentiated anxiety response. Occurrence uncertainty, or the inability to predict if a threat will occur, has rarely been compared experimentally with temporal uncertainty, or the inability to predict when a threat will occur. The current study aimed to (a) directly compare the anxiogenic effects of anticipating these two types of uncertain threat, as indexed by the eyeblink startle response, and (b) assess the relationship between startle response to occurrence and temporal uncertainty and individual differences in self-reported intolerance of uncertainty and anxiety...
January 31, 2018: Psychophysiology
https://www.readbyqxmd.com/read/29370235/time-limited-involvement-of-caudal-anterior-cingulate-cortex-in-trace-eyeblink-conditioning-retrieval-is-dependent-on-conditioned-stimulus-intensity
#11
Xuan Li, Guang-Yan Wu, Juan Yao, Yi Yang, Jian-Ning Ye, Jian-Feng Sui
The medial prefrontal cortex (mPFC) has been widely investigated for its roles in learning and memory. The present study investigated the time-limited involvement of the caudal anterior cingulate cortex (cACC) of the mPFC in the retrieval process for a simple associative motor learning, trace eyeblink conditioning (tEBC), using a 75 dB or 100 dB tone as the conditioned stimulus (CS). The GABAA receptor agonist muscimol was injected into the cACC of guinea pigs at 1 day or 4 weeks after tEBC acquisition. When muscimol was administered 1 day after tEBC acquisition, the conditioned response (CR) of the 75 dB group was severely impaired, whereas the CR of the 100 dB group exhibited no significant change relative to the control...
2018: PloS One
https://www.readbyqxmd.com/read/29330006/cue-and-context-conditioning-to-respiratory-threat-effects-of-suffocation-fear-and-implications-for-the-etiology-of-panic-disorder
#12
Christoph Benke, Manuela G Alius, Alfons O Hamm, Christiane A Pané-Farré
Interoceptive threats play a crucial role in the etiology of panic disorder (PD). While body sensations may become conditioned stimuli (CS) when paired with such interoceptive threats (cue conditioning), the environment in which such interoceptive threats occur may also be learned as a predictor of threat (context conditioning). Suffocation fear (SF) might facilitate these associative learning processes if threats of suffocation become relevant as unconditioned stimuli (US). To investigate whether SF affects associative learning during such respiratory threat, we used mild dyspnea as CS that predicted the occurrence of strong dyspnea (US) in one context (predictable), was not related to the occurrence of the US in another context (unpredictable) or was presented in a different context (safe) in which no US was delivered...
February 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29291580/the-effect-of-panic-disorder-versus-anxiety-sensitivity-on-event-related-potentials-during-anticipation-of-threat
#13
Elizabeth S Stevens, Anna Weinberg, Brady D Nelson, Emily E E Meissel, Stewart A Shankman
Attention-related abnormalities are key components of the abnormal defensive responding observed in panic disorder (PD). Although behavioral studies have found aberrant attentional biases towards threat in PD, psychophysiological studies have been mixed. Predictability of threat, an important feature of threat processing, may have contributed to these mixed findings. Additionally, anxiety sensitivity, a dimensional trait associated with PD, may yield stronger associations with cognitive processes than categorical diagnoses of PD...
March 2018: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/29243588/dynamic-modulation-of-activity-in-cerebellar-nuclei-neurons-during-pavlovian-eyeblink-conditioning-in-mice
#14
Michiel M Ten Brinke, Shane A Heiney, Xiaolu Wang, Martina Proietti-Onori, Henk-Jan Boele, Jacob Bakermans, Javier F Medina, Zhenyu Gao, Chris I De Zeeuw
While research on the cerebellar cortex is crystallizing our understanding of its function in learning behavior, many questions surrounding its downstream targets remain. Here, we evaluate the dynamics of cerebellar interpositus nucleus (IpN) neurons over the course of Pavlovian eyeblink conditioning. A diverse range of learning-induced neuronal responses was observed, including increases and decreases in activity during the generation of conditioned blinks. Trial-by-trial correlational analysis and optogenetic manipulation demonstrate that facilitation in the IpN drives the eyelid movements...
December 15, 2017: ELife
https://www.readbyqxmd.com/read/29154809/facilitated-acquisition-of-the-classically-conditioned-eyeblink-response-in-active-duty-military-expressing-posttraumatic-stress-disorder-symptoms
#15
Justin D Handy, Pelin Avcu, Nora Ko, Alejandro Ortiz, Michael J Doria, Richard J Servatius
OBJECTIVE: Learning diathesis models underscore the role of hyper-conditioning in the development of PTSD following trauma exposure. Eyeblink classical conditioning is one method of examining associative learning biases independent of fear and threat produced by trauma. Facilitated learning is apparent in individuals self-expressing PTSD symptoms, as well as behaviorally inhibited (BI) temperament, a vulnerability factor for PTSD. Here, we examine eyeblink conditioning in active duty military personnel and relate learning with PTSD symptomology...
February 26, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29115280/real-time-cerebellar-neuroprosthetic-system-based-on-a-spiking-neural-network-model-of-motor-learning
#16
Tao Xu, Na Xiao, Xiaolong Zhai, Pak Kwan Chan, Chung Tin
OBJECTIVE: Damage to the brain, as a result of various medical conditions, impacts the everyday life of patients and there is still no complete cure to neurological disorders. Neuroprostheses that can functionally replace the damaged neural circuit have recently emerged as a possible solution to these problems. Here we describe the development of a real-time cerebellar neuroprosthetic system to substitute neural function in cerebellar circuitry for learning delay eyeblink conditioning (DEC)...
February 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29054591/us-alone-trials-presented-during-acquisition-do-not-disrupt-classical-eyeblink-conditioning-empirical-and-computational-findings
#17
M T Allen, C E Myers, D Williams, R J Servatius
Studies of partial reinforcement in eyeblink conditioning have typically shown slower learning of a CS-US association when paired CS-US trials are interleaved with CS-alone trials. However, recent work has shown that CS-US learning is not slowed by interleaved US-alone trials. This discrepancy is surprising since both partial reinforcement protocols reduce the total number of paired CS-US trials. Previously, Kimble et al. (1955) reported that inserting a block of US-alone trials during CS-US training did not disrupt eyeblink acquisition...
October 18, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29051391/trace-eyeblink-conditioning-is-associated-with-changes-in-synaptophysin-immunoreactivity-in-the-cerebellar-interpositus-nucleus-in-guinea-pigs
#18
Rui Li, Qi Li, Xiao-Lei Chu, Tao Tao, Lan Li, Cheng-Qi He, Fang-You Gao
Synaptic plasticity plays a role during trace eyeblink conditioning (TEBC). Synaptophysin (Syn) is a major integral transmembrane protein, located particularly in the synaptic vesicles, and is considered a molecular marker of synapses. In addition, Syn immunoreactivity is an important indicator of synaptic plasticity. In this study, we used immunohistochemical techniques to assess changes in Syn expression in the cerebellar IN of guinea pigs exposed to TEBC and pseudoconditioning. Additionally, we analyzed the relationship between Syn immunoreactivity and the percentage of trace-conditioned responses...
October 19, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28968654/optogenetic-inhibition-of-medial-prefrontal-cortex-pontine-nuclei-projections-during-the-stimulus-free-trace-interval-impairs-temporal-associative-motor-learning
#19
Guang-Yan Wu, Shu-Lei Liu, Juan Yao, Xuan Li, Bing Wu, Jian-Ning Ye, Jian-Feng Sui
The medial prefrontal cortex (mPFC) is closely involved in many higher-order cognitive functions, including learning to associate temporally discontiguous events (called temporal associative learning). However, direct evidence for the role of mPFC and the neural pathway underlying modulation of temporal associative motor learning is sparse. Here, we show that optogenetic inhibition of the mPFC or its axon terminals at the pontine nuclei (PN) during trace intervals or whole trial period significantly impaired the trace eyeblink conditioning (TEC), but had no significant effects on TEC during the conditioned stimulus or intertrial interval period...
September 18, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28893553/caffeine-has-no-effect-on-eyeblink-conditioning-in-mice
#20
Anders Rasmussen, Anna C H G Ijpelaar, Chris I De Zeeuw, Henk-Jan Boele
Caffeine is one of the most widely used drugs in the world. In the brain, caffeine acts as an antagonist for the adenosine A1 and A2B receptors. Since A1 receptors are highly concentrated in the cortex of the cerebellum, we hypothesized that caffeine could potentially affect learning tasks that require the cerebellar cortex, such as eyeblink conditioning. To test this hypothesis, we examined the effect of low (5mg/kg) and high (50mg/kg) doses of caffeine, injected intraperitoneally before training, on eyeblink conditioning in mice...
January 30, 2018: Behavioural Brain Research
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