In a proper fraction, the numerator is smaller than the denominator. This holds true no matter how large both are. As long as the numerator is the smaller of the two, the fraction is a proper fraction. For example, 998/999 is a proper fraction. Even though the numbers are both large, and they're only separated by 1, the numerator is still smaller than the denominator. Likewise, 1/999 is a proper fraction.
Due to the fact that the sural nerve is so close to the surface of the skin, it makes it much more likely to become injured due to compressions on the skin and the fact that most injuries occur on the surface of the skin.
The ulnar nerve passes through several small spaces as it courses through the medial side of the upper extremity, and at these points the nerve is vulnerable to compression or entrapmentâa so-called pinched nerve. The nerve is particularly vulnerable to injury when there has been a disruption in the normal anatomy. The most common site of ulnar nerve entrapment is at the elbow, followed by the wrist. Causes or structures which have been reported to cause ulnar nerve entrapment include: Problems originating at the neck: thoracic outlet syndrome, cervical spine pathology, compression by anterior scalene muscles.