SI joint
Spine-pelvis linking point
The SI joint is the sacroiliac joint, where the base of the spine meets the pelvis.
This joint connects the sacrum to the ilium bones on each side and bears much of the upper body's weight.
SI joint dysfunction is a common source of lower back pain: The doctor thinks my SI joint is inflamed.
Fused vertebrae above tailbone
Persistent dull discomfort
- discomfortMild physical or mental distress
- inflammationProtective tissue response
- tendernessGentle, caring quality
- sorenessTender, painful sensation
stiffness · sciatica · referred pain · low back pain · flare-up · chronic · acute · radiating
Joining into unity
- stabilizationProcess of becoming steady
- injectionSyringe-delivered dose
- corticosteroidAdrenal-derived inflammation suppressant
- physical therapyRehabilitative movement-based medical care
bracing · manipulation · mobilization · stretching · strengthening · chiropractic · osteopathic · denervation
Excessive joint flexibility
- misalignmentImproper positioning relative to reference
- asymmetryAbsence of balanced form
- instabilityTendency toward unpredictable change
- laxityLack of strictness
fixation · shearing · torsion · rotation · postpartum · compensation · imbalance
sacrum
Fused vertebrae above tailbone
ache
Persistent dull discomfort
- discomfortMild physical or mental distress
- inflammationProtective tissue response
- tendernessGentle, caring quality
soreness · stiffness · sciatica · referred pain · low back pain · flare-up · chronic · acute · radiating · degenerative
fusion
Joining into unity
- stabilizationProcess of becoming steady
- injectionSyringe-delivered dose
- corticosteroidAdrenal-derived inflammation suppressant
physical therapy · bracing · manipulation · mobilization · stretching · strengthening · chiropractic · osteopathic · denervation
hypermobility
Excessive joint flexibility
- misalignmentImproper positioning relative to reference
- asymmetryAbsence of balanced form
- instabilityTendency toward unpredictable change
laxity · fixation · shearing · torsion · rotation · postpartum · compensation · imbalance
compression test
Cylinder pressure measurement
CT scan · palpation · physical examination · fluoroscopy · bone scan
- sacrumsacrum, sacral
- lumbar spinelumbar spine, lumbar vertebrae, L1, L5, lumbar region
SI jointshoulder joint
Arm-to-torso articulation
hip joint · knee joint · ball-and-socket joint · hinge joint
joint, joints, jointed, jointing, jointly, disjoint, disjointed, conjoint, adjoin