Topic
Climbing
About: Climbing is a research topic. Over the lifetime, 4122 publications have been published within this topic receiving 43284 citations.
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TL;DR: Recording the activity of individual climbing fibers during cerebellum-dependent eyeblink conditioning in mice found that climbing fibers signaled both the unexpected delivery and the unexpected omission of the periocular airpuff that served as the instructive signal for eyeb link conditioning.
Abstract: Climbing fiber inputs to Purkinje cells are thought to be involved in generating the instructive signals that drive cerebellar learning. To investigate how these instructive signals are encoded, we recorded the activity of individual climbing fibers during cerebellum-dependent eyeblink conditioning in mice. We found that climbing fibers signaled both the unexpected delivery and the unexpected omission of the periocular airpuff that served as the instructive signal for eyeblink conditioning. In addition, we observed that climbing fibers activated by periocular airpuffs also responded to stimuli from other sensory modalities if those stimuli were novel or if they predicted that the periocular airpuff was about to be presented. This pattern of climbing fiber activity is markedly similar to the responses of dopamine neurons during reinforcement learning, which have been shown to encode a particular type of instructive signal known as a temporal difference prediction error.
183 citations
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TL;DR: The determinants of climbing performance are not clear but may be attributed to trainable variables rather than specific anthropometric characteristics.
Abstract: Rock climbing has increased in popularity as both a recreational physical activity and a competitive sport. Climbing is physiologically unique in requiring sustained and intermittent isometric forearm muscle contractions for upward propulsion. The determinants of climbing performance are not clear but may be attributed to trainable variables rather than specific anthropometric characteristics.
181 citations
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01 Feb 2002-Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology
TL;DR: The structure of proximal leg joints allows for flexibility in leg use by generating subtle, but effective changes in the direction of leg movement, which provides a range of strategies for both animals and walking machines.
Abstract: An advantage of legged locomotion is the ability to climb over obstacles. We studied deathhead cockroaches as they climbed over plastic blocks in order to characterize the leg movements associated with climbing. Movements were recorded as animals surmounted 5.5-mm or 11-mm obstacles. The smaller obstacles were scaled with little change in running movements. The higher obstacles required altered gaits, leg positions and body posture. The most frequent sequence used was to first tilt the front of the body upward in a rearing stage, and then elevate the center of mass to the level of the top of the block. A horizontal running posture was re-assumed in a leveling-off stage. The action of the middle legs was redirected by rotations of the leg at the thoracal-coxal and the trochanteral-femoral joints. The subsequent extension movements of the coxal-trochanteral and femoral-tibial joints were within the range seen during horizontal running. The structure of proximal leg joints allows for flexibility in leg use by generating subtle, but effective changes in the direction of leg movement. This architecture, along with the resulting re-direction of movements, provides a range of strategies for both animals and walking machines.
178 citations
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TL;DR: In this paper, the authors investigated the quality of experience and risk perception associated with high-altitude rock climbing and found that the opportunity for experiencing flow can motivate climbers to take part in a risky expedition.
Abstract: Six climbers were monitored during an expedition in the Himalaya, comprising 13 days of traveling and 26 days of mountaineering. The aim was the investigation of the quality of experienceand risk perception associated with high-altitude rock climbing. By means of experience sampling method, participants provided on-line repeated self-reports about activities carriedout, and the associated quality of the experience, in terms of mood, intrinsic motivation, potency, confidence, engagement, and risk assessment. The experience fluctuation model wasapplied to identify experiential profiles on the basis of the perception of environmental challenges and personal skills. When both challenges and skills were positive, flow experience wasreported. In particular, we found that the opportunity for experiencing flow can motivate climbers to take part in a risky expedition. The results showed that risk played a minor role in climbing,in line with a goal-directed approach to risk seeking. These findings have two implicat...
178 citations