Disclaimer: while I try to keep the information on my post-it notes as accurate as possible, I can't be held responsible for any damages that are incurred from following them! If you notice any errors please let me know and I'll edit it, take it down, or add a note.Medicine by Post-It Note
More detailed post-it of the corticospinal tracts, showing the two tracts and their decussation.
Descending tracts in the spinal cord. Descending tracts are generally motor, and are divided into pyramidal tracts (cotricospinal and corticobulbar - i.e. the voluntary ones) and extra-pyramidal (all the others).
Corticospinal tract: carries motor fibres. Has an anterior (15%) and a lateral (85%) branch. Anterior controls the axial muscles while the lateral controls limbs and skilled movements. They decussate in slightly different places, with the LCS crossing in the lower medullary pyramids, and the ACS at the spinal level they exit through.
Corticobulbar: not seen on this diagram because it doesn’t actually make it into the spinal cord. It terminates on cranial nerve motor nuclei to deal with motor functions of cranial nerves: facial expression, extra-ocular, etc.
Vestibulospinal: controls balance. It is special because it remains ipsilateral. Someone with a lesion of the vestibulospinal tract will fall (due to loss of balance control) towards the side of the lesion.
Reticulospinal: deals with reflexes. Has two branches, the pontine branch does extensor reflexes exclusively, while the medullary does both extensor and flexor. It also stays ipsilateral.
Tectospinal: another reflex type tract, that responds to visual and auditory stimuli. It is the reason that blind people can sometimes turn their head towards a flashing light without seeing it, but sensing it. Spooky.
Rubrospinal: bit vestigial in humans to be honest, most of its functions have been superseded by the corticospinal tract with which it joins in the lateral column of the spinal cord.
Support structures of the uterus. Weakening of any of these structures can lead to a uterovaginal prolapse.
I never actually let you guys know of this, but I passed my exams in February.
Anonymous said: Could you do one for neural development??? This topic never sticks with me!! Notochorod, neural crest, neural plate.... goes right over my head. Thanks from a worried med student.
You’re actually in luck! I used to find this topic confusing as well, and so there are already some neural development post-its!
If there are any other bits (e.g. eye) that you’d specifically like me to cover then let me know!
After my exam I went home and slept for a few days, and now I’m on an out placement so I don’t have access to my printer during the week. I will endeavour to post some post its at the weekend!
Guess who is procrastinating on her OSCE cramming by making a post it note describing how little she wants to cram? The SBA was officially the most tiring written assessment I’ve ever done. There were 100 separate cases each with one question. Each question had 5 possible answers, of which three were usually acceptable, but only one was the BEST answer.
They are devil incarnate. We all came out with banging headaches because there was so much reading.
On the bright side, in about 14 hours I’ll be done!