In anatomy, the styloid process is any sharp protrusion of a bone. The temporal bone of the skull and the radius and ulna of the lower arm all have styloid processes. They usually serve as points of attachment for muscles. Major body systems: Integumentary system Muscular system Nervous system Reproductive system Respiratory system Excretory system Circulatory system Lymphatic system Skeletal system (Human skeleton) Endocrine system Digestive system Immune system Organs: Anus Appendix Brain Breast Colon or large intestine Diaphragm Ear Eye Heart Kidney Labia Larynx Liver Lung Nose Ovary Pharynx... Grays illustration of a human femur, a typically recognized bone. ... The temporal bones (os temporales) are situated at the sides and base of the skull. ... The radius and ulna of the left forearm, posterior surface. ... The ulna (along with the radius) is one of the two bones in the forearm. ... A top-down view of skeletal muscle Muscle is a contractile form of tissue. ...
On the medial side of the process is a deep groove, the mastoid notch (digastric fossa), for the attachment of the Digastricus; medial to this is a shallow furrow, the occipital groove, which lodges the occipital artery.
situated between the tympanic portion and the mastoid process is the tympanomastoid fissure, for the exit of the auricular branch of the vagus nerve.
The styloidprocess is developed from the proximal part of the cartilage of the second branchial or hyoid arch by two centers: one for the proximal part, the tympanohyal, appears before birth; the other, comprising the rest of the process, is named the stylohyal, and does not appear until after birth.
At the junction of the anterior root with the zygomatic process is a projection for the attachment of the temporomandibular ligament; and behind the anterior root is an oval depression, forming part of the mandibular fossa, for the reception of the condyle of the mandible.
This process serves for the attachment of the Sternocleidomastoideus, Splenius capitis, and Longissimus capitis.
At the upper and front part of the process they are large and irregular and contain air, but toward the lower part they diminish in size, while those at the apex of the process are frequently quite small and contain marrow; occasionally they are entirely absent, and the mastoid is then solid throughout.
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