Lab 5 notes - Lab 5 notes The Neck This lab will cover the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lab 5 notes – The Neck This lab will cover the osteology, muscles, organs/structures, innervation and blood supply of the neck. Unlike previous labs on the limbs, muscles will be less of a focus, and nerves and blood vessels will be more important. Skeleton of the neck The skeleton of the neck consists of the cervical vertebrae, the base of the skull, the mandible and the hyoid bone; the ribs, clavicle and scapula also act as attachment points for some neck muscles. In addition the hyaline cartilages that make up the larynx are considered as the laryngeal skeleton. You have all seen the cervical vertebrae before- you should take the opportunity in this lab to review their common features- the bifid spinous process, transverse foramen and characteristic shape of the vertebral bodies - and to make sure you are able to recognize the two distinctive vertebrae, the atlas and axis. The base of the skull- you should begin to familiarize yourself with the morphology of the skull as soon as possible in order to fully understand the material on the head and neck. In this lab I will limit myself to that part of cranial morphology which is important for understanding the structures we will talk about today. Occipital bone – The occipital bone makes up the back and base of the skull In inferior view there is a large hole in the occipital bone called the foramen magnum (literally “big hole”) through which the spinal cord exits the skull. On either side of the foramen magnum on the external (inferior) surface are the occipital condyles which articulate with the atlas. Lateral to the FM on each side there is a smaller hole called the jugular foramen formed partly by the occipital and partly by the temporal bone. Temporal bone - The temporal bone is a complex cranial bone that makes up parts of the cranial base and sides of the cranial vault. It has a large number of important foramina (holes) through which nerves and arteries enter or exit the skull. It also houses the organs of hearing and balance. The features on the temporal bone that you should recognize for this lab are the bony parts of the ear canal, the external auditory meatus (e.a.m.), which is a landmark for two processes which muscles attach to; the inferiorly projecting mass of bone behind the ea.m. is called the mastoid process, and the thinner spine of bone anterior and medial to the e.a.m. called the styloid process . Mandible. The mandible is also an important muscle attachment point for muscles which move structures in the neck. The two main parts of the mandible are the body (the horizontal part) and the ramus (vertical part posterior to the body) The anterior point on the midline of the body of the mandible, the mandibular symphysis , has on its posterior surface a depression called the digastric fossa . On the medial side of the body of the mandible there is an oblique line called the mylohyoid line . The latter two features are attachment points for muscles with the same name.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Lab 5 notes - Lab 5 notes The Neck This lab will cover the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online