Kinematic response in limb and body posture to sensory feedback from carpal sinus hairs in the rat ( Rattus norvegicus)

Niederschuh, Sandra J.; Helbig, Thomas; Zimmermann, Klaus; Witte, Hartmut; Schmidt, Manuela

doi:10.1016/j.zool.2017.02.001

Cited by 4 publications

(1 citation statement)

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“…There are clear similarities between the gait patterns of cats and rats, but there are also many differences. For example, rats walk with a crouched posture, bearing a greater proportion of their weight on the hind legs (Niederschuh et al, 2017). Rats exhibit freezing in the presence of predator odors (Griffith, 1920) and standing up driven by curiosity (Deschênes et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Intralimb locomotor coordination in rats walking on asymmetric pegway

Hanna

Salido

Lal

et al. 2023

Preprint

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Complex movements such as walking or reaching are generated by a sequence of muscle actions. How these coordinated actions subserve complex movements and their recovery after disruption remains unknown. The use of high throughput recording-stimulation systems with microelectrode access to structures along the neuraxis may complement the neurological models in rodents. To this purpose, we have trained rats to perform the precise foot placement locomotor task that allows us to assess skilled locomotor movements. Animals were pretrained on the peg walkway task, which was configured to impose either symmetric or asymmetric (with overstepping) locomotor stepping at preferred stride length. Selected forelimb muscles were implanted with intramuscular differential electrodes. After a week of recovery, we collected electromyography from the implanted muscles and ground reaction forces from the array of force sensors embedded into walkway pegs. The temporal relationship between muscle bursts was measured for each intralimb set of muscles (n=13) in symmetric and asymmetric stepping. The sequence corresponded to the progression of muscle actions responsible for limb lift, flexion and transport, overground clearance, and preparation for ground contact. The stereotyped spatiotemporal sequence of muscle activity was persistent and mirroring across the asymmetric tasks. These patterns are similar to those observed in cats during locomotion with and without obstacles and reaching movements. These findings support the hypothesis that the profiles of muscle activations are qualitatively similar across quadrupeds during precise locomotor tasks.

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Section: Introductionmentioning

confidence: 99%