Would fibrous and cartilaginous joints be able to perform their functions if the
ID: 91738 • Letter: W
Question
Would fibrous and cartilaginous joints be able to perform their functions if they had joint cavities? Explain. Your father plans to visit an alternative medicine practitioner for "cranial therapy." You read the brochure for this proposed treatment and more that it involves the movement and manipulation of the cranial sutures, which the practitioner claims will cure nearly all diseases. What kine of joint is a cranial suture, both structurally and functionally? Given these facts, what do you think of the claims made about "cranial therapy"? The term double-jointed describes individuals who have an abnormally large range of motion in a given joint. This excess range of motion is not because of the presence of a second joint but, instead, weakness of the ligaments surrounding the joint. Why would weakness of ligaments lead to a greater range of motion at a joint? Compare the structure of the hip joint and the shoulder joint. Which joint do you think would be more likely to dislocate? Why?
Explanation / Answer
4. Hip Joint
It is present in the lower limb.
It is formed between the acetabulum of the pelvis and the head of the femur.
Ligaments include
Fibrous capsule
Iliofemoral ligaments
Pubofemoral ligaments
Ischiofemoral ligament
Ligament oh head of femur
Acetabular labrum
Transverse acetabular ligament.
Blood supply
Obturator art
Two circumflex femoral aart
Two gluteal art.
SHOULDER JOINT
Glenohumeral joint between glenoid cavity of scapula and the head of the humerus.
Ligaments
Capsular ligament
Coracohumeral ligament
Transverse humeral ligament
Glenoidal labrum
Blood supply
Ant. Circumflex humeral vessels
Post. Circumflex humeral vessels
Suprascapular vessels
Subscapular vessels.
SHOULDER joint is more prone to dislocation than any other joint because laxity of the capsule and disproportionate area of articular surfaces.
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