Anatomy and Cell Biology 2221 Lecture Notes - Lecture 4: Ligamenta Flava, Semispinalis Muscles, Facet Joint
16 Sep 2018
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Anatomy 9501 lecture 4: deep back & spinal cord. There are 4 main groups of these muscles: respiratory, spinotransversales, erector spinae, transversospinales. Note: extrinsic/intrinsic muscles of scapular region = appendicular group of back muscles. These are all innervated by the ventral rami. These muscles include: serratus posterior superior: elevates the ribs, serratus posterior inferior: depresses the ribs. Innervated by the dorsal rami: splenius capitus: bilaterally it extends the neck, unilaterally it allows lateral flexion & rotation, splenius cervicis: bilaterally it extends the neck, unilaterally it allows lateral flexion & rotation. Movement: bilateral = trunk/neck extension, unilateral = trunk/neck rotation. These are all innervated by the dorsal rami: spinalis, longissimus. Movement: bilaterally = trunk extension, unilaterally = lateral flexion of trunk. These are all innervated by the dorsal rami. This would sprain post. longitudinal ligament, supraspinous ligament and ligamentum flavum. Pars interarticularis: piece between articulations, piece between the facet joints.
