Before coming to the lab study the cross-section through the neck shown below.
We will discuss this in lecture as well. This will help you think about what to expect as you dissect this crowded region of the body.
Distinguish the following components:
- The outer wrapping of the skin and the cutaneous nerves and vessels.
- The vertebral column.
- The complex of epaxial muscles.
- The three muscle groups representing remnants of the hypaxial musculature:
- The rectus cervicis muscle group (equivalent to the rectus abdominis muscle), which includes the geniohyoid, omohyoid, sternohyoid, sternothyroid, and thyrohyoid muscles.
- The scalene muscles (cervical equivalents of the intercostals in the thorax and the obliquus muscles in the abdomen).
- A layer of long and short prevertebral muscles running along the ventral surface of the neck vertebrae.
- The cervical gut and gut derivatives: the pharynx, esophagus, trachea, and the glands of the neck.
- The muscles of the pharyngeal arches wrapped around the gut tube.
- The facial muscles of the second arch, which spread out beneath the skin of the face, scalp, and neck The slightly deeper sternocleidomastoid and trapezius muscles.