Human Anatomy and Histology · MU Plovdiv

24. External surface of the base of the skull - elements, passing through the openings and canals.

Inside: 9 sections · 11 labelled pictures · 14 flashcards · 2 min

Topic 24 of 138 in the MU Plovdiv syllabus for Human Anatomy and Histology (Dental Medicine, Year 2). The free AceMed note covers it in 9 sections, about 265 words (2 min of reading), with 14 flashcards.

In this note

  1. Introduction
  2. CRANIAL BASE
  3. Sphenoid bone
  4. Occipital bone:
  5. Ethmoid bone
  6. Temporal Bone:
  7. Internal Structure:
  8. MANDIBLE
  9. HYOID BONE

Introduction

11+12

CRANIAL BASE

  • The bones of the cranial base are:
  • Occipital bone
  • Sphenoid bone
  • Temporal bone
  • Ethmoid bone.

Temporal Bone:

  • located on the lateral aspect of the skull

External Surface:

Consists of 4 parts:

  1. Squamous Portion: largest & most superior
  2. Tympanic Part: including structures of the middle ear
  3. Petrous Part: inferiorly.
  4. Mastoid Part: posterior & inferiorly (behind the external ear)

Internal Structure:

11 cont.

MANDIBLE

  • The mandible is a horseshoe shaped mobile bone.
  • Consists of 2 parts:
  • Body
  • → the alveolar part
  • → the base of mandible.
  1. Ramus

Coronoid process → attachment site for the temporalis muscle.

condylar process. ↳ articulates with the articular tubercle of the temporal bone.

  • External Surface:

Mental foramen ↳ allows for the passage of nerves & vessels to the lower lip & chin region

  • Internal Surface:

Mandibular foramen: An entrance to the mandibular canal, which contains the inf. alveolar n. & blood vessels.

Submandibular fossa: contains the submandibular gland.

Mylohyoid line ↳ attachment site for mylohyoid m.

Sublingual fossa → Contains the sublingual gland.

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