Note these muscles on your specimens and observe their attachments above and below the hyoid bone. These muscles are arranged in superficial and deep groups. Note - The deep group are enclosed in the thoracolumbar fascia. Observe this in transections through the lumbar region.
Small muscles lie deep to the erector spinae muscle group.
Refer to your textbook for a description of these muscles, called the transversospinal group. Floor or thoracic cage diaphragm Note the attachments of the diaphragm and determine the effect of its contraction on the thorax. Observe the openings in the diaphragm . These muscles may be placed into two groups, the anterolateral and the posterior muscles. Identify this on your specimen.