Anatomy and Cell Biology 2221 Lecture Notes - Lecture 6: Erector Spinae Muscles, Posterior Ramus Of Spinal Nerve, Ventral Root Of Spinal Nerve
4 Apr 2020
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We rely on ligaments to keep vertebrae on top one another and these muscles to. When we move around they are constantly working to keep everything aligned. Gives us our posture and balance keep the spine aligned and upright. The 3 muscles of the erector spinae: iliocostalis, from the ilium, up to the ribs. Spans out across the ribs attaching to all the transverse processes: forms the lumbar curvature, longissimus, attaches to all of the transverse processes, medial to iliocostalis, spinalis, attaches to all spinous processes occipital bone. All 3 muscles attach to the mastoid process of the temporal bone or. They are attached to the vertebrae and are off of the ribs. Spinal nerve consists of ventral and dorsal horns: 2 ventral horns, off of the ventral horns, there are ventral roots. Responsible for motor information: 2 dorsal horns, off of the dorsal horns, there are dorsal roots meet. They then branch off into 2 sections:
