Medical Terminology for Pulled Back Muscle
The medical term for a pulled back muscle in the lower back is "lumbar strain" or "lumbar muscle strain." 1, 2
Primary Terminology
- Lumbar strain is the standard medical term used to describe injury to the muscles or tendons in the lower back region 3
- This condition is classified under "nonspecific low back pain" when there are no signs of serious underlying conditions such as cancer, infection, cauda equina syndrome, spinal stenosis, radiculopathy, vertebral compression fracture, or ankylosing spondylitis 4
- The term "mechanical low back pain" is also used, which refers to pain arising intrinsically from the spine, intervertebral disks, or surrounding soft tissues 2
Clinical Context and Classification
- Lumbar strain falls under the broader category of low back pain, defined as pain and discomfort localized below the costal margin and above the inferior gluteal folds, with or without leg pain 1
- When symptoms are present for fewer than 4 weeks, it is termed acute low back pain; when present for more than 3 months, it becomes chronic low back pain 4
- The quadratus lumborum muscle is a particularly important source of lumbar strain that is often underdiagnosed 3
Pathophysiology
- Lumbar muscle strain involves pathological changes including muscle edema, intermuscular space edema and/or fluid accumulation, and spaces beside the spinous process showing edema and/or fluid 5
- Chronic cases may develop fatty infiltration, fibrosis, and structural changes in the paraspinal muscles 6
Important Distinction
- Lumbar strain should be distinguished from radiculopathy (nerve root dysfunction with pain, sensory impairment, weakness, or diminished reflexes) and sciatica (pain radiating down the leg below the knee in sciatic nerve distribution) 4