Anatomy Bones and Muscles · MU Pleven

9.Lateral surface of the skull

Covers the lateral view of the skull, showing how the braincase and facial bones form its side wall. It lists the neurocranial and viscerocranial bones seen from this side, the coronal, squamous and lambdoid sutures, and key landmarks such as pterion and asterion. It also describes the temporal, infratemporal and zygomatic arch regions, the mastoid and styloid processes, and the supraorbital, infraorbital and mental foramina. Clinical notes cover pterion fracture, mastoiditis and mandibular fractures.

Inside: 7 sections · 5 labelled pictures · 14 flashcards · 2 min

Topic 9 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 7 sections, about 208 words (2 min of reading), with 14 flashcards.

In this note

  1. LATERAL SURFACE OF THE SKULL
  2. GENERAL
  3. BONES SEEN IN LATERAL VIEW
  4. SUTURES VISIBLE
  5. IMPORTANT LANDMARKS
  6. OPENINGS SEEN
  7. CLINICAL NOTES

GENERAL

THE LATERAL VIEW OF THE SKULL SHOWS THE SIDE WALL OF THE CRANIAL VAULT AND FACE

IMPORTANT FOR SURGICAL LANDMARKS AND SUTURES

FORMED BY BOTH NEUROCRANIUM (BRAINCASE) AND VISCEROCRANIUM (FACIAL SKELETON)

BONES SEEN IN LATERAL VIEW

1. NEUROCRANIUM

FRONTAL PARIETAL OCCIPITAL, TEMPORAL, GREATER WING OF SPHENOID

2. VISCEROCRANIUM (FACIAL BONES)

NASAL, ZYGOMATIC MAXILLA, MANDIBLE

SUTURES VISIBLE

CORONAL SUTURE → BETWEEN FRONTAL + PARIETAL BONES

SQUAMOUS SUTURE → BETWEEN TEMPORAL + PARIETAL BONES

LAMBDOID SUTURE → BETWEEN OCCIPITAL + PARIETAL BONES

IMPORTANT LANDMARKS

PTERION → JUNCTION OF FRONTAL, PARIETAL, TEMPORAL, SPHENOID BONE

→ THINEST SKULL AREA → FRACTURE CAN TEAR MIDDLE MENINGEAL ARTERY → EPIDURAL HEMATOMA

ASTERION → JUNCTION OF PARIETAL, TEMPORAL, OCCIPITAL BONES

→ SURFACE LANDMARK FOR TRANSVERSE SIGMOID SINUS JUNCTION.

TEMPORAL FOSSA → ABOVE ZYGOMATIC ARCH, CONTAINS, TEMPORALIS MUSCLE

INFRATEMPORAL FOSSA → BELOW ZYGOMATIC ARCH, CONTAINS PTERYGOID MUSCLE, MAXILLARY ARTERY, MANDIBULAR NERVE

ZYGOMATIC ARCH → FORMED BY TEMPORAL + ZYGOMATIC BONES

EXTERNAL ACOUSTIC MEATUS → EAR CANAL OPENINGS.

MASTOID PROCESS → ATTACHMENT FOR STERNOCLEIDOMASTOID

STYLOID PROCESS → SLENDER PROJECTION (MUSCLE AND LIGAMENT ATTACHMENTS)

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