Compounds of ひねる

• 首をひねる
  (exp,v5r) to cock one's head in puzzlement
  to tilt one's head in contemplation
  to wrack one's brain
  to think hard
• 頭をひねる
  (exp,v5r) to puzzle over
  to think deeply about
  to wrack one's brains over
• 赤子の手をひねる
  (exp) exceptionally easy (like taking candy from a baby)
  lit: as easy as twisting a baby's hand
• 赤子の腕をひねる
  (exp) exceptionally easy (like taking candy from a baby)
  lit: as easy as twisting a baby's arm