Ch 7 Skull and Axial Structures Flashcards
Axial skeleton contains
- Skull
- vertebral column
- Thoracic cage
cranium bones
calvarium
base of cranium
calvarium is located…
- Roof of cranium
Base of cranium is located…
- Floor of cranium
Bones of the calvarium
Parietal bone
Frontal bone
Occipital bone
Where on the head is the parietal bone
middle/side of head
Where on the head is the frontal bone
front of head
Where on the head is the occipital bone
back of head
Bones of the base of cranium
ethmoid
sphenoid
occipital
temporal
parts of frontal and parietal
Main sutures
Coronal
Sagittal
lambdoid
squamous suture
coronal suture is located…
Between frontal and parietal
sagittal suture location
- Between parietal bones
Lambdoid suture location
- Occipital and parietal
- Squamous suture
- Temporal and parietal
Cranial fossa features
- Floor of cranial cavity w 3 cranial fossae
- Anterior cranial fossa
- Middle cranial fossa
- Posterior cranial fossa
What is the VAN Complex
- Vein
- Artery
- Nerve
- Go into foramen
Major cavities of the skull
Cranial cavity
Orbit
Paranasal sinuses
Nasal cavity
Oral cavity
Purpose of cranial cavity
houses the brain
Purpose of the orbit
houses the eyes
name the 3 paranasal sinuses
Frontal sinus
Ethmoidal sinuses
Maxillary sinus
frontal sinus location
highest up sinus
- Ethmodial sinuses location
- Middle next to eyes
- Maxillary sinus location
- Cheek area
How many facial bones are there
14
Sex differences in skull
- Male squared off
- Women rounded
5 sections of the vertical column
- Cervical (C1-C7)
- Thoracic (T1-T12)
- Lumbar (L1-L5)
- Sacrum (S1-S5)
- Coccyx (Co1-Co4))
How many cervical spine bones
7
(C1-C7)
number of thoracic spine bones
12
(T1-T12)
number of Lumbar spine bones
5
(L1-L5)
Number of bones in sacrum
5
(S1-S5)
Number of bones in coccyx
4
(Co1-Co4)
4 types of spinal curvature
cervical
thoracic
lumbar
pelvic
cervical curvature is called
- Lordosis
Thoracic curvature is called
- Kyphosis
Lumbar curvature is called
- Lordosis
Vertebral anatomy features
body
vertebral arch
pedicles
laminae
vertebral canal
intervertebral foramina
vertebral body
- Weight bearing region, separated by intervertebral disc
- Vertebral arch
- Attaches to body to form vertebral foramen
- Pedicles
- Feet of vertebral arch
- Laminae
- Posterior extensions of vertebral arch
- Vertebral canal
- Stacked vertebral foramina
- Contains spinal cord
- Intervertebral foramina
- Passage for spinal nerves
What is the atlas
First cervical vertebra
C1
Atlas features
- Articulates with the occipital condyles of the skull
- Supports the head
- No body of vertebra
what is the axis
Second cervical vertebra
C2
Axis features
- Dens axis (tooth of axis)
Atlantoaxial Joint
- the dens of axis serves as a pivot point for atlas
- Permits rotation of the head
Thoracic cage is composed of…
- Thoracic vertebrae (posterior)
- Ribs laterally
- Sternum anteriorly
How many ribs are there
- 12 pairs
- True ribs
- Ribs 1-7
- Costal cartilage attach to sternum
- False Ribs
- Ribs 8-12
- Costal cartilage do not attach directly to sternum
- Floating ribs
- 11 and 12