Hey there Sign in to join this conversationNew here? Join for free

mydriasis and mydriatic drugs.

Announcements Posted on
Study Help needs new mods! 14-04-2014
Post on TSR and win a prize! Find out more... 10-04-2014
    • Thread Starter

    hellew. Two of my lecture pages are contradicting eachother. I shall type the exact words it says.
    on one lecture page it says:-
    "dilator pupillae - smooth muscle arranged radially- stimulation of sympathetic fibres---> contraction of radial muscle---->dilation of pupil = mydriasis.
    but on another lecture page it says:-
    Mydriatic drugs
    Muscarinic antagonist
    atropine (tropicamide) - passive mydriasis (loss of mitotic drive to constrictor pupillae)

    is mydriasis the dilation of pupil or the constriction on pupil?
    • 1 follower

    Parasympathetic innervation constricts pupil (occulomotor nerve)...

    Blockade of parasympathetic innervation (by atropine) dilates pupil...

    This is passive dilation (passive mydriasis)...

    • Thread Starter

    sorry :s:


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

    You don't slide that way? No problem.

Updated: August 18, 2007
Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.