Description of the features of all the axial bones including the skull bones (neurocranium and viscerocranium / cranial fossa / sutures / landmarks), auditory ossicles, the hyoid bone, the vertebral column (primary and secondary curvatures / unique features of each region of vertebra), the rib cage...
Overview
- Sites articulation for appendicular
o Sacroiliac joints
§ immobile to enable mobility of the trunk
Skull bones
- 22 bones
- Sutural bones
- Neurocranium - superior
o Two paired bones
o Four single bones
o Dome shaped roof formed by: (Calvaria)
§ Frontal
• Forms forehead
§ Parietal bones – pair
• One on each side of the head
§ Occipital
• Posterior to the head
§ Temporal bones – pair
• At ear
o Cranial base
§ Inferior part of temporal and frontal bone involved as well
§ Sphenoid bone
• Irregular bone
• Butterfly bone – shaped like butterfly
o Has wings on each side and two little pieces that bridge
together
• Superior surface serves the cranial base
• Inferior serves the roof of nasal cavity
• Divides into the
o central body
§ Contains the sphenoid sinuses
◊ Opens into the nasal cavity
o greater wings
§ Extends in a lateral, superior, posterior position
from body
§ Contains 3 foramen
o lesser wings
§ Superolateral direction
o Pterygoid process
§ Descends inferiorly from the body
, from body
§ Contains 3 foramen
o lesser wings
§ Superolateral direction
o Pterygoid process
§ Descends inferiorly from the body
§ Medial pterygoid process
◊ Supports posterior opening of nasal cavity
§ Lateral pterygoid process
◊ Origin of medial and lateral pterygoid
muscles
§ Pharynx lies in between the two pterygoid
processes
• Connects neurocranium to facial skeleton
§ Ethmoid bone
• Inferior surface forms the roof of our nasal cavity
• Superior surface is floor of cranial base
- Viscerocranium – facial skeleton - inferior
o Six paired bones
o Two single bones
o Gives support to the soft tissue that attaches to the facial skeleton
o Nasal bones
§ Two tiny bones
§ Meet at midline of skull
§ Form the nose bridge
o Lacrimal bones
§ Medial corner of the eye
o Palatine bones
§ L shaped bone
§ Forms the lateral wall and floor of nasal cavity
o Inferior nasal conchae
§ Inserts into the nasal cavity
§ Forms passages for air flow
o Zygomatic bones
§ Irregular bone
§ Cheek bones – highest point of cheek
§ Forms zygomatic arch on face
• Formed by two bones
o Temporal process of zygomatic bone and zygomatic
process of temporal bone
§ Reaches external acoustic meatus
o Attachment site for muscles
§ Articulates with
• Sphenoid bone at sphenozygomatic suture
• Temporal bone at temporozygomatic suture
o Maxillae
§ Forms upper jaw
o Mandible
§ Articulates with temporal bones
• Temporomandibular joint
o Vomer
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LauraS123. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.49. You're not tied to anything after your purchase.
