Category: B

  • Binocular rivalry

    The continuous alternation in the conscious perception of visual stimuli to the two eyes.  

  • Boiled rice water

    The water remaining after rice has been cooked in it and removed; formerly used as an oral rehydration agent, especially for children with diarrhea. The use of oral rehydration solutions, however, has provided a better supply of fluids and electrolytes and has replaced the practice of using boiled rice water for rehydration.  

  • Bicipital rib

    An irregular condition resulting from the fusion of two ribs, usually involving the first rib.  

  • Bigeminal rhythms

    The coupling of extrasystoles with previously normal beats of the heart.  

  • Bell-metal resonance

    The sound heard in pneumothorax on auscultation when a coin is held against the chest wall and struck by another coin.  

  • Bandbox resonance

    The pulmonary resonance heard during chest percussion in patients with emphysema.  

  • Baseline fetal heart rate

    Average range of beats per minute recorded within a 10-min time frame. Normal range is between 120 and 160 beats per minute.  

  • Bucket-handle radiograph

    An informal term for radiograph taken with the beam aimed from beneath the chin toward the vertex of the skull. It is used to assess facial and orbital floor injuries.  

  • Bregma-menton radiograph

    A radiograph taken in the submental-vertex plane, from below the chin to the top of the skull. It shows the contour of the zygomatic arches and the lateral separation of the mandibular condyles, coronoid processes, or both.  

  • Bitewing radiograph

    A radiograph that shows the crowns and upper third of the roots of upper and lower teeth. It is made by using a dental film with a tab (bitewing) or placement device that holds the film in place when the jaws are closed on the tab and is used to detect proximal caries and the…