BACKGROUND Falls cause more than 60% of head injuries in older adults. Lack of objective evidence on the circumstances of these events is a barrier to prevention. We analyzed video footage to determine the frequency of and risk factors for head impact during falls in older adults in 2 long-term care facilities. METHODS Over 39 months, we captured on video 227 falls involving 133 residents. We...

  Background: Postural structure abnormalities have been highly prevalent among children in primary school children.The present study aimed to assess the relationship between the backpacks weight and method of carrying with postural structure disturbances in primary school children.   Materials and Methods: This cross-sectional study was performed on 472 primary school children in Karaj-Iran. ...

Control of head position during postural responses is important to facilitate both the interpretation of vestibular signals and the stabilization of gaze. In these experiments, we compared head stabilization for two different postural tasks: 1) in response to perturbations at the head, and 2) in response to perturbations induced at the support surface, which perturb both body and head position....

Background: Abnormal head and neck postures play a significant role in developing cervical spine dysfunction. Forward posture (FHP) is one of the most common findings individuals who experience disorders. Objectives: This study used photographic method to analyze head, upper neck, lower forward both static quasi-static states. Since timely diagnosis appropriate treatment are important preventin...

Electrical Impedance Tomography (EIT) is an imaging method which enables a volume conductivity map of a subject to be produced from multiple impedance measurements. It has the potential to become a portable non-invasive imaging technique of particular use in imaging brain function. Accurate numerical forward models may be used to improve image reconstruction but, until now, have employed an ass...

Analytical solutions to the magnetic forward problem are known only for special volume conductors [1, 2, 3], which are insufficient to describe detailed head shapes. The forward calculation for a realistic volume conductor can so far only be solved by numerical algorithms, such as the boundary element method (BEM) [4, 5, 6, 7, 8, 9], which pose severe problems for superficial sources due to the...

Head model and an efficient method for computing the forward EEG (electroencephalography)problem are essential to dipole source localization(DSL). In this paper, we use less expensive ovoid geometry to approximate human head, aiming at investigating the effects of head shape and dipole source parameters on EEG fields. The application of point least squares (PLS) based on meshless method was int...

36 To contribute appropriately to voluntary reaching during body motion, vestibular signals must be 37 transformed from a headto a body-centered reference frame. We quantitatively investigated the 38 evidence for this transformation during online reach execution by using galvanic vestibular 39 stimulation (GVS) to simulate rotation about a head-fixed, roughly naso-occipital axis as human 40 sub...