The following information is intended as a resource and should not be used to self-diagnose or treat.
Over the next few issues of the Djoniba Newsletter, we will share with you critical health information concerning your back with particular focus on the spine. From the back structure to potential injury and injury prevention to safety tips, we will address those different topics as an information guide to help you better understand your back.
The spine structure: Your back is a complex and intricate structure of bones, muscles, and other tissues extending from your neck to your pelvis.
Your spine is a column of 33 bones (called vertebrae) that extend from your skull to your pelvis. Between each vertebrae is an intervertebral disk that acts as a shock absorber.
The spinal disk: The spinal disc has twobasic parts: an inner Jell-O like center called the Nucleus Pulposus and an outer surface called the Annulus Fibrosis. The Nucleus Pulposus is the water-rich (proteoglycan-rich), gelatinous center of the disc. The Annulus Fibrosus is much more fibrous (tougher) than the nucleus, and is made of a tough cartilage-like substance. Its main job is to hold-in-place the highly pressurized centre (nucleus), which can escape its central prison.
The vertebrae are made of bones and are divided in four sections: Cervical vertebrae (your neck), Thoracic vertebrae (your upper back), Lumbar vertebrae (your lower back), and the Sacrum and Coccyx (the base of your spine).
Each Vertebrae is referred to with numbers and affect different part of your body:
CERVICAL VERTEBRAE (in red):
C1: To supply blood to the head, pituitary gland, scalp, bones of the face, brain inner and middle ear, sympathetic nervous system, eyes, and ears.
C2: Eyes, optic nerves, auditory nerves, sinuses, mastoid bones, tongue, forehead, and heart.
C3: Cheeks, outer ear, face, bones, teeth, trifacial nerve, and lungs.
C4: Nose, lips, mouth, Eustachian tube, mucus membranes, and lungs.
C5: Vocal cords, neck glands, and pharynx.
C6: Neck muscles, shoulders, and tonsils.
C7: Thyroid gland, bursa in the shoulders, and elbows.
THORACIC VERTEBRAE (in blue):
T1: Arms from the elbows down, including hands, arms, wrists and fingers; oesophagus and trachea, and heart.
T2: Heart, including its valves and covering coronary arteries; lungs; bronchial tubes.
T3: Lungs, bronchial tubes, pleura, chest, breast, and heart.
T4: Gallbladder, common duct, heart, lungs, and bronchial tubes.
T5: Liver, solar plexus, circulation (general), heart, oesophagus, and stomach.
T6: Stomach, oesophagus, peritoneum, liver, and duodenum.
T7: Kidneys, appendix, testes, ovaries, uterus, adrenal cortex, spleen, pancreas, and large intestine.
T8: Spleen, stomach, liver, pancreas, gallbladder, adrenal cortex, small intestine, and pyloric valve.
T9: Adrenal cortex, pancreas, spleen, gallbladder, ovaries, uterus, and small intestine.
T10: Kidneys, appendix, testes, ovaries, uterus, adrenal cortex, spleen, pancreas, and large intestine.
T11: Kidneys, ureters, large intestine, urinary bladder, adrenal medulla, adrenal cortex, uterus, ovaries, and ileocecal valve.
T12: Small intestine, lymph circulation, large intestine, urinary bladder, uterus, kidneys, and ileocecal valve.
LUMBAR VERTEBRAE (in yellow):
L1: Large intestine, inguinal rings, and uterus.
L2: Appendix, abdomen, upper leg, and urinary bladder.
L3: Sex organs, uterus, bladder, knee, prostate, and large intestine.
L4: To prostate gland, muscles of the lower back, sciatic nerve
L5: Lower legs, ankles, feet, and prostate.
And finally, the SACRAL VERTEBRAE (in green) or COCCYX VERTEBRAE (in purple), at the very bottom or tip of the spine.
Source: Spine-health.com / wellness-therapist-info.com
Next issue: The different injuries associated with your Spine.