Anatomy 7 - The Girdles Flashcards
What bones does the pectoral girdle consist of
The scapula and clavicle
What is the joint between the pectoral girdle and the axial skeleton
The sternoclavicular joint
What connects the scapula and the thoracic cage
Muscle
What does the muscular connection between the thoracic cage and scapula allow
Great mobility of the shoulder girdle
What type of bones does the pelvic girdle consist of
Two innominate bones
Three elements that make up the pelvic bone
The ilium, ischium and pubis
In children what are the elements of the pubic bone connected by
Cartilage
At what age do the pubic elements fuse to form the pubic bone
16-18
What does the pectoral girdle serve as
A muscle attachment site for muscles of the upper back, neck and chest
The bones of the pelvic girdle are
Strongly united
Since the bones of the pelvic girdle are strongly united this makes the structure
Largely immobile and good for weight bearing
What does the pelvic girdle allow in relation to weight bearing
It allows for the weight of the torso to be passed into the lower limbs which improves stability
Description of the scapula
It is flat and triangular which allows for soft muscle attachment
Description of the clavicle
Serves as a rigid support from which the scapula and upper limb are suspended
What is loaded between the superior and lateral borders of the scapula
The glenoid fossa
What is the glenoid fossa
A shallow depression that articulates with the humerus bone of the arm to form the glenohumeral joint.
What are the small bony bumps located immediately above and below the glenoid cavity
The supraglenoid tubercle and the infraglenoid tubercle
What is the function of the supra and infraglenoid tubercles
Site of muscle attachment of the arm
The cortacoid process is the attachment site for
Muscles of the anterior arm and chest
Function of the ischium
Supports the body while sitting
What acts as a sites of muscle attachment for muscles of the thighs
Anterior superior and inferior iliac spines
What does the ilium articulate with
The sacrum
What is the articulation between the ilium and sacrum called
Sacroiliac joint
What serves as an attachment site of the posterior thigh muscles
Ischial tuberosity
What stabilises the pectoral girdle
The rotator cuff muscles
What muscles stabilise the pelvic girdle
The gluteus mediums and minimums, piriformis, quadratus femoris and obturator internus
What innervated the pectoral girdle
The brachial plexus
What innervates the muscles of the pelvic girdle
The lumbosacral girdle
Differences in the infrapubic angle between males and females
It is less than 90 degrees in males and greater than 90 degrees in females
Differences in the pelvic inlet in males and females
In males it is more heart-shaped, while in females it is more round or oval
What is the difference in the males greater sciatic notch
It is narrower than females
