<prompt> In a Subclan aery block at the outer border of 1st rib, all of the following aeries help in maintaining the circulation to upper limb exceptSubscapular aerySuperior thoracicThyrocervical trunkSuprascapular aery  <response>: In distal subclan proximal axillary aery block aerial anastomosis exists between 1st pa of SCA3RD pa OF axillary aery Ref: Grays 40ep447-451 