urface of the bone can be felt all the way
down. The inner edge can be felt, but not so plainly.
6. The head of the _fibula_ is a good landmark on the outer side of
the leg, about one inch below the top of the tibia. Note that it is placed
well back, and that it forms no part of the knee joint, and takes no share
in supporting the weight. The shaft of the fibula arches backwards and is
buried deep among the muscles, except at the lower fourth, which can be
distinctly felt.
7. The _malleoli_ form the great landmarks of the ankle. The outer
malleolus descends lower than the inner. The inner malleolus advances more
to the front and does not descend so low as the outer.
8. The line of the _clavicle_, or collar bone, and the projection of
the joint at either end of it can always be felt. Its direction is not
perfectly horizontal, but slightly inclined downwards. We can distinctly
feel the _spine_ of the scapula and its highest point, the _acromion_.
9. Projecting beyond the acromion (the arm hanging by the side), we
can feel, through the fibers of the _deltoid_, the upper part of the
humerus. It distinctly moves under the hand when the arm is rotated. It is
not the head of the bone which is felt, but its prominences (the
tuberosities). The greater, externally; the lesser in front.
10. The _tuberosities of the humerus_ form the convexity of the
shoulder. When the arm is raised, the convexity disappears,--there is a
slight depression in its place. The head of the bone can be felt by
pressing the fingers high up in the axilla.
11. The _humerus_ ends at the elbow in two bony prominences (internal
and external condyles). The internal is more prominent. We can always feel
the _olecranon_. Between this bony projection of the ulna and the internal
condyle is a deep depression along which runs the ulna nerve (commonly
called the "funny" or "crazy" bone).
12. Turn the hand over with the palm upwards, and the edge of the
_ulna_ can be felt from the olecranon to the prominent knob (styloid
process) at the wrist. Turn the forearm over with the palm down, and the
head of the ulna can be plainly felt and seen projecting at the back of
the wrist.
13. The upper half of the _radius_ cannot be felt because it is so
covered by muscles; the lower half is more accessible to the touch.
14. The three rows of projections called the "knuckles" are formed by
the proximal bones of the several joints. Thus the first row is formed by
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