• abducens nerve
  • abiotrophy
  • abscess
  • absence seizure
  • accessory nerve
  • acetylcholine
  • acoustic neuroma
  • action potential
  • acute
  • adenocarcinoma
  • adrenal gland
  • adrenaline
  • adrenergic
  • afferent
  • agent analyzer
  • albumin
  • amygdala
  • analgesia
  • anemia
  • anesthesia
  • aneurysm
  • anhidrosis
  • anisocoria
  • annulus fibrosus
  • anomaly
  • anosmia
  • anoxia
  • anterior
  • antibody
  • anticonvulsant
  • antigen
  • aortic thromboembolism
  • apnea
  • arachnoid
  • arachnoid cyst
  • arachnoid villi
  • areflexia
  • arrhythmia
  • arteritis
  • arthritis
  • arthrogryposis
  • aspergillosis
  • aspiration pneumonia
  • astrocyte
  • ataxia
  • atlantoaxial
  • atlantoaxial subluxation
  • atlas
  • atonia
  • atrophy