hydrogen bomb. hydrogen bomb or H-bomb, weapon deriving a large portion of its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb, uranium or plutonium is split into lighter elements that together weigh less than the original atoms, the remainder of the mass appearing as energy.nlike this fission bomb, the hydrogen bomb functions by the fusion, or joining together, of lighter elements into heavier elements. The end product again weighs less than its components, the difference once more appearing as energy.
2) Babinski Sign. When the foot and toes abnormally extend upward toward the head during a plantar reflex assessment, this is called Babinski sign or Babinski reflex. It can be benign. Sleeping adults and children under two tend to have Babinski sign with no underlying pathology.) Babinski Sign. When the foot and toes abnormally extend upward toward the head during a plantar reflex assessment, this is called Babinski sign or Babinski reflex. It can be benign. Sleeping adults and children under two tend to have Babinski sign with no underlying pathology.
1 The abnormal plantar reflex, or Babinski reflex, is the elicitation of toe extension from the wrong receptive field, that is, the sole of the foot. 2  Thus a noxious stimulus to the sole of the foot produces extension of the great toe instead of the normal flexion response. The plantar reflex is a nociceptive segmental spinal reflex that serves the purpose of protecting the sole of the foot. 2  The clinical significance lies in the fact that the abnormal response reliably indicates metabolic or structural abnormality in the corticospinal system upstream from the segmental reflex.