50 Percutaneous electrical vestibular stimulation evokes reflexive responses in appendicular 51 muscles that are suppressed during tasks where the muscles are not contributing to balance 52 control. In neck muscles, which stabilize the head on the torso and in space, it is unclear if 53 similar postural task dependence shapes vestibular reflexes. We investigated whether 54 vestibulocollic refle...

purpose: to determine the effect of horizontal recti surgery on visual acuity and head posture and electronystagmographic indices in patients with congenital nystagmus. methods: this prospective comparative case series was conducted on 58 patients with congenital nystagmus who were referred to our clinic over three years. patients were divided into three groups: the first group (29 cases) had h...

We used electromyography on juvenile American alligators to test the hypothesis that the following muscles, which are known to play a role in respiration, are recruited for aquatic locomotion: M. diaphragmaticus, M. ischiopubis, M. rectus abdominis, M. intercostalis internus, and the M. transversus abdominis. We found no activity with locomotion in the transversus. The diaphragmaticus, ischiopu...

Driving is associated with high activation of low-back and neck muscles due to the sitting position and perturbations imposed by the vehicle. The aim of this study was to investigate the use of a neck balance system together with a lumbar support on the activation of low-back and neck muscles during driving. Twelve healthy male subjects (age 32±6.71 years) were asked to drive in two conditions:...

INTRODUCTION The compressive loading on the cervical spine results the activation of the neck muscles to counterbalance their impact on the posture of the joint. Wearing a helmet in many sports or military and work activities increases the compressive loading. The compressive load is estimated to range from 120 to 1200N [1]. In this current study and based on our finite element model, we aim to...

one of the most common diseases associated with musculo-skeletal ailment is low back pain which is epidemic among general public. if manual tasks are performed inappropriately by workers at workplaces, it may cause back pain in the lumbar spine. in recent years, a variety of assistive devices has been presented and used to utilize a passive force generator which has been effective in decreasing...

The long necks of sauropods have been subject to many studies regarding their posture and flexibility. Length of the neck varies among groups. Here, we investigate neck posture and morphology in several clades from a mechanical viewpoint. Emphasis is put on comparing sauropod necks and tails with structures in living archosaurs and mammals. Differences in the use made of necks and tails lead to...