Chapter 7 Flashcards
TMJ
Acts like a sliding hinge connecting your jawbone to your skull
Sacrum angle
Has 30 degree angle
Factors that affect mobility
Curvature of spine Thickness of discs Shape, direction of facets Spinous process Ribs
Frontal bone
Forms the anterior cranium
Parietal bone
Two large rectangular bones that form most of the superior and lateral aspects of the skull
Occipital bone
Forms most of the skulls posterior wall and base
Temporal bones
Viewed on the lateral skull surface
Sphenoid bone
Bat shaped bone. Spans the width of the middle cranial fossa
Ethmoid bone
Forms most of the bony area between the nasal cavity and the orbits
Mandible
U shaped. Or lower jawbone
Maxilla bone
Form the upper jaw and central portion of the facial skeleton
Zygomatic bones
Cheek bones
Coronoid process
Insertion point for the large temporalis muscle that elevates the lower jaw during chewing
Lacrimal bones
Medial walls of each orbit (tears)
Differences between male and female pelvis
Female
Tilted forward, adapted for child bearing, pelvis is broad
Bones lighter and smoother
Acetabela is smaller and farther apart
Pubic angle is 80 to 90 degree more rounded
Male Tilted less far foward. Adapted for support of males heavier build. Pelvis is narrow and deep Bones are thicker and heavier Acetabela closer together Angle is smaller 50 to 60 degrees
Ilium
Large flaring bone that forms the superior region of the coxal bone
Ischium
Forms the posteroinferior part of the hip bone. L shaped
Pubis
Forms the anterior portion of the hip bone
Acetabulum
Point of the fusion of ilium, ischium, and pubis is hemispherical socket called the acetabulum. Receives head of femur
Shoulder joint
Only the clavicle attaches to the axial skeleton. The scapula can move quite freely across the thorax, allowing the arm to move with it
The socket of the shoulder joint is shallow and poorly reinforced, so it doesn’t restrict the movement of the humerus. This is good for flexibility, it is bad for stability
Clavicle
S shaped
Glenoid
The thick lateral , or axillary border abuts the armpit and ends superiority in a small, shallow fossa
Acromion
The spine ends laterally in an enlarged roughened triangle projection called the acromion
Acromioclavicular joint
The acromion articulates with the acromial end of the clavicle forming the acromioclavicular joint
