A hand is a prehensile , multi- fingered appendage located at the end of the forearm or forelimb of primates such as humans , chimpanzees , monkeys , and lemurs. A few other vertebrates such as the koala which has two opposable thumbs on each "hand" and fingerprints extremely similar to human fingerprints are often described as having "hands" instead of paws on their front limbs. The raccoon is usually described as having "hands" though opposable thumbs are lacking. The human hand normally has five digits: four fingers plus one thumb ;   these are often referred to collectively as five fingers, however, whereby the thumb is included as one of the fingers. The metacarpal bones connect the fingers and the carpal bones of the wrist.
The evidential value of developmental age imaging for assessing age of majority
X-Hand - Startradiology
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Aim : To consider the evidential value of developmental age images for identifying age of majority. Methods : The published literature on hand—wrist X-rays, MRI scans of the distal radius and orthopantomograms of the lower left third molar is considered in terms of the mean age of attainment of the adult appearance and the diagnostic test performance of the adult appearance to predict adult status, either administratively under football or forensically. Results : The mean age of attainment of a mature hand-wrist X-ray is under 18 years and most individuals are mature before age For the MRI wrist scan and the third molar the age of attainment is over 19 years and the adult appearance is an indicator of adulthood, while the immature appearance is uninformative about likely age. So MRI and third molars have high specificity, but low sensitivity.
X-rays of the hand are requested frequently, particularly at the Emergency Assistance department. See also figure 1. Figure 1. For a PA image, the hand lies flat on the x-ray plate, at the level of the shoulder with the elbow in 90 degrees flexion. The x-ray beam will pass through the hand from dorsal to palmar fig.