What bony landmark of the upper limb is used as a reference point for locating t

Question

What bony landmark of the upper limb is used as a reference point for locating the ulnar nerve at the elbow? Which of the two necks of the humerus do you think is more likely to fracture in an accident? Why? Observe the relationship between the carpal bones and the distal portion of the radius and ulna on an articulated skeleton. Which of the carpal bones do you think is most likely to fracture when someone falls on an outstretched hand? Why do you think it is functionally important that the bones of the os coxae fuse together rather than remain independent bones? A fracture to which of the leg bones (tibia or fibula) would result in the greatest loss of function of the lower limb? Why?

Explanation / Answer

24.Bony landmark of the upper limb which is used as a reference point for locating the ulnar nerve at elbow is medial epicondyle of humerus.

25.The neck of humerus more likely to fracture in an accident is Surgical neck because inferiorly it is least supported by the capsular ligament.

26.Most commonly fractured carpal bone as a result of falling on an outstretched hand and often associated with fractured distal radius is the scaphoid bone of the wrist.

28.Fracture to fibula would result in greatest loss of fuction of the lower limb because  fracture of the fibula may be associated with injury to common peroneal nerve which will lead to foot drop and loss of sensation.

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