Rub the tiny green face with the ball of the thumb.

The ball of the thumb had disappeared in his flesh.

The balls of the thumbs are rounded, but when I tense my muscles hard ridges form across the palms.

The hand that lay in his lap was skinned on the palm and the ball of the thumb was bleeding.

The nerve then passes downward to the ball of the thumb, where it ends in cutaneous filaments.

The ball of the thumb had been sliced cleanly off, the open wound cauterized with searing metal.

Ball of the thumb may be:

The balls of the thumb and the backs of the hands were covered with minute slashes which were not deep enough to draw blood.

The rest of the ball of the thumb and most of the palm was heavily stippled with tiny penetrations.

The lateral branch supplies the skin over the ball of the thumb, and communicates with the volar branch of the lateral antebrachial cutaneous nerve.

He held up his hand, rubbing the ball of the thumb over the calloused palm and gazing at the dirt that was ingrained in the flesh itself and which no brush could scrub away.

The left hand is used to stop the strings by pressing down with the fleshy part of the finger, generally using the ball of the thumb at the back of the neck to obtain pressure.

More remarkable than all this, is a visible nerve, perceptible under the skin, which starts from the wrist skirting the ball of the thumb, and branching, fork-like, at the roots of the fore and middle fingers.

This was not of course found at the scene, but it was probably a flat plastic box pack, smaller than a crush-proof cigarette-packet, with a single flush button depressed by the ball of the thumb to effect detonation.