KIN * 3090 Worksite Project

Stepwise Dissection of posterior musculature of the back with Suboccipital Triangle Showcase

Latissimus DorsiCleaned, cut along origin (spinous process of T8-

T12, thoracolumbar fascia, posterior iliac crest, separated from Serratus Posterior inferior) and reflected laterally.

Trapezius Cleaned, cut along origin (external occipital protuberance, medial 3rd of nuchal line, spinous process of T1-T12) and portion of insertion (medial 3rd of spine of scapula) and reflected laterally

Rhomboid MajorCut along origin (spinous process of T1-T4) and reflected laterally

Rhomboid Minor Cut along origin (spinous process of C7 and T1) and reflected laterally

Thoracolumbar Fascia Removed all thoracolumbar fascia to expose erector spinae

Serratus Posterior Superior Cut along origin (Spinous process of C7-T3) and reflected laterally

Serratus Posterior Inferior Cut along origin (T12-L3) and reflected laterally

Splenius CapitisCut along origin (Spinous process of C7-T4) and reflected superiorly

Ligamentum NuchaeCut along spinous process of C7-C1 and reflected superiorly

Splenius CervicisCut along origin of spinous processes of T3-T6 and reflected superio-laterally.

Ilocostalis Cut along insertions (transverse processes of C4-C6, rib angle 1-12 ) reflected inferiorly

Longissimus Cut along insertions of spinous processes of T1-T12 and tubercles of ribs 1-12) and reflected inferiorly

Longissimus CapitusCut along origin of transverse processes of T1-T5 and reflected superiorly

Semi-spinalis CapitusCut along the origins at transverse processes of C7-T7, the articular processes of C4-C6 and reflected superiorly

Subooccipital Triangle - Rectus Capitus Posterior Major, Rectus Capitus Posterior Minor, Superior Obliques, Inferior Obliques

Cleaned of fascia and showcased

Laminectomy of T2 – T8 vertebrae Cut with reciprocating saw along lamina of T2-T8 on both sides and removed , cut open dura mater to reveal spinal cord.

Reflection

I took an interest in anatomy many years ago, but had limited experience in education. I was introduced to higher level learning in College and I became even more interested in anatomy. Once accepted to the bridge semester of Guelph Humber University, I was excited to know that our anatomy class had a practical component at a cadaver lab using real specimens. I took a keen interest in this as we could see actual anatomy instead of perfect textbook renderings. I took such an interest that I decided to try a placement at that very lab, hoping to do my own dissection. I was able to be placed there and decided to do a dissection of back muscles. I was quick to learn as I dove right in without much guidance, I had previous experience as a butch so I was able to transfer those skills to dissecting. I was met with a few obstacles, the first being the separation of the latissimus dorsi from the serratus posterior inferior. This was a very tedious task, the muscle tissue of the serratus posterior inferior was extremely fragile and the tendon seemed to be fused with the more superficial tendon of the latissimus dorsi. Although this task was difficult, I took my time and managed to overcome this obstacle. This gave me hope and confidence that I would be able to complete my dissection with good time and quality. Upon completion of the whole dissection, my supervisor advised me that I did a great job, well enough that this specimen will be used to teach 3rd and 4th year anatomy students. I am grateful that I, the first Guelph-Humber representative to be placed at the Guelph University anatomy lab, have delivered quality work that will showcase Guelph Humber student potential.