Rotating image of human brain, illustrating the lateral sulcus in the brain. The term sulcus (pl. sulci) is a general descriptive term for a furrow or fissure.
Halo may refer to: 1  Halo (religious iconography), a glow or ring of light around a head or person in art. 2  Halo (series), video game franchise.
halo device. Orthopedics A device used to manage cervical spine injuries to minimize neurological damage, requiring long-term immobilization; in the halo device, pins are inserted on the outer skull for skeletal traction, using a 2-3 kg weight for upper cervical injuries and 10-15 kg for lower cervical injuries.