Core stability strength & coordination is necessary to perform smooth & coordinated upper & lower extremity movements & function. Altered core stability muscle strength, coordination & poor motor control can cause low back pain (LBP). Physical therapists especially those working with children having neurodevelopmental problems or adults with neurological disorders such as stroke are aware of the concepts of global movements. In this concept, alterations in one body segment may bring changes in other body segments. In neurological rehabilitation, the concept of Neuro-Developmental Technique (NDT) introduced by Bobath got worldwide recognition. This concept states that there are specific key points in the neck, & shoulders that can facilitate normal movements by enhancing the activity of core musculature in functional movements for instance, sit to stand & walking. This concept was further explored by Burnstein and suggested that biomechanically body joints and motor control works together as functional unit and not as single limb movement. Bobath and proprioceptive neuromuscular facilitation (PNF) concepts further explained that movements of the eye, head and neck facilitate trunk movements. Electromyography studies have shown that both single and rhythmical jaw opening and closing movements not only produced well-coordinated jaw and head-neck movements but also produced atlanto-occipital and cervical spine joints movements. The author further concluded that mouth opening and closing in fetal yawning is associated with head extension-flexion movements indicating that functional connections between the jaw and head-neck is innate. A human jaw or masticatory system is connected to the motor system through cranial nerves unlike central motor system which is connected to the body through spinal motor system. Brainstem central pattern generator (CPG) control masticatory system through descending pathways and are involved in voluntary movements of the jaw such as mouth opening and closing. The higher brain centers cortical masticatory area and primary motor cortex control these movements. In the current back pain literature core stability exercises have been used in the management of chronic low back pain. The jaw is connected to the head-neck and neck is connected to the trunk. Therefore there is to study the effects of core stability exercises performed with and without jaw movements in the management of chronic low back pain.

A randomized experimental controlled trial will be carried out to compare the effectiveness of core stabilization exercises performed with and without jaw movements in the management of nonspecific chronic low back pain. A total of 80 male and female volunteers having subjects with chronic nonspecific low back pain will be recruited in this study. All subjects will be assessed for transverse abdominal muscle strength contraction, pain and disability using Pressure Biofeedback Unit (BPU), Numeric Pain Rating Scale (NPRS 0-10cm) and Ronald Morris Disability Questionnaire (RMDQ 0-24) respectively. The scores on the mentioned scales will be documented as per guidelines. After baseline assessment, all subjects will be allocated to two groups through computer-generated random sampling. Group 1 will perform core stability exercises alone; Group 2 will perform core stability exercises with teeth clenching This study will be conducted at the Physiotherapy Department of Sindh Institute of Physical Medicine and Rehabilitation (SIPM&R). The computer-generated random sampling technique will be used to allocate the participants into the study groups. Data will be analyzed using SPSS 22 and one-way repeated measure ANOVA will be applied to see the mean difference in the 2 groups. For pair-wise comparison, the Tukey test will be applied. For pain and disability scales Friedman's test will be applied to see the two scales' median differences.

Inclusion Criteria:

• · Participants having chronic low back pain lasting more than 12 weeks.

  • Age 20-45 years
  • Participants having nonspecific chronic low back pain with or without referred leg pain.
  • Both male and female patients.
  • Currently seeking care for low back pain.
  • No known TMJ pathology.
  • Had Magnetic Resonance Image (MRI) to exclude serious pathology and been diagnosed by the consultant and non-specific low back pain.

Exclusion Criteria:

• · Participants with known or suspected serious spinal pathology (fracture, metastatic, inflammatory or infective diseases of the spine, cauda equine syndrome/widespread neurological disorder, lumbar spondylosis, stenosis, spondylolisthesis).

  • Compromised nerve root
  • Previous spinal surgery or scheduled for major surgery during the treatment.
  • Co-morbid health conditions that would prevent active participation in the exercise programs such as asthma.
  • Low back pain having less than 12 weeks history.
  • Known Temporomandibular joint pathology or jaw pain.