This narrative review explains the mechanism by which abnormal hip pathologies contribute to low back pain in patients without hip osteoarthritis.

Anthony N Khoury, Munif Hatem, Joshua Bowler, Hal David Martin, Hip–spine syndrome: rationale for ischiofemoral impingement, femoroacetabular impingement and abnormal femoral torsion leading to low back pain, Journal of Hip Preservation Surgery, hnaa054.

KEY POINTS: HIP-SPINE SYNDROME

• Hip abnormalities limiting hip flexion and/or extension require compensation from the pelvis and lumbar spine for the lack of sagittal movement at the hip.
• Between 13.1% and 37.5% of the total hip flexion is provided by the pelvis through sagittal movement at the lumbopelvic area.
• Abnormalities at the hip joint contributing to low back pain include flexion deformities, osteoarthritis, developmental dysplasia, and limited hip range of movement.
• The bony overgrowth of a cam impingement produces shear forces resulting in...

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Multiple Processes Independently Predict Motor Learning

Perry et al. J Neuro Engineering Rehabil (2020) 17:151 https://doi.org/10.1186/s12984-020-00766-3. 

The authors of this paper used an ethological approach to test the hypothesis that practice-related refinements of multiple behavioural features would be independently predictive of motor learning.

Key Points

• Motor learning results from neural adaptations that produce refinements of behavioural features of motor tasks.
  
  
• Motor learning can induce changes in visual processing that are associated with the refinements of skilled limb movement.
• The interactions between skilled limb movements and visual search lead to coordinated patterns of the eyes and limbs (ie., hand-eye...