Exam 4 (Final) Flashcards
What are the bones of the shoulder joint?
scapula, clavicle, humerus
What are the parts of bones that make up the glenohumeral joint?
The spherical head of the humerus, and the small shallow glenoid fossa of the scapula
The spherical head of the humerus is ______
convex
The head of the glenoid fossa of the scapula is ______
concave
The glenohumeral joint is what type of joint?
ball and socket
How many degrees of freedom does the GH joint move in?
3
What are the osteokinematis of the GH joint?
F/T/S + Scaption
the GH joint can move in ______ degrees of abduction/adduction
120/-
The GH joint can move in ____ degrees of rotation
70-90
The GH joint can move in _____ degrees of horizontal abduction/adduction
45/135
The GH joint can move in _____ degrees of flexion and extension
120/50
Why is the GH joint frequently injured?
Due to its design
What deepens the glenoid fossa?
Labrum
Why are the ligaments of the GH joint so lax?
To accommodate wide ROM
What does the labrum do?
deepens fossa, provides cushioning, and prevents excessive translation of humeral head
What are the ligamentous reinforcements of the GH joint?
Coracohumeral, superior glenohumeral, middle glenohumeral, inferior glenohumeral
The GH joint capsule allows for _____ of distraction
1-2 inches
What is the redundant fold?
an axillary pouch
What do the rotator cuff muscles do?
provide compression of the GH joint and give dynamic ligament tension
Joint compression resists what and does what else?
translation forces, centers humeral head
What are the superior muscular reinforcements of the GH joint?
supraspinatus and long head of biceps
What is the inferior musclular reinforcement of the gh joint?
long head of triceps
What is the anterior muscular reinforcement of the gh joint?
subscapularis, pectoralis major, and teris major
What is the posterior muscular reinforcement of the gh joint?
infraspinatus and teres minor
The deltoid is force-coupled with what?
infraspinatus, teres minor, subscapularis
The lower serratus anterior is force coupled with what?
lower trapezius
The levator scapulae is force coupled with what?
weight of arm
What are the specific motions of the gh joint?
horizontal abduction/adduction, diagonal abduction/adduction, circumduction
Abduction is paired with what motion?
upward rotation
Adduction is paired with what motion?
downward rotation
Flexion is paired with what motion?
Elevation/upward motion
Extension is paired with what motion?
depression/downward rotation
Internal rotation is paired with what motion?
Protration
External roation is paired with what motion?
retraction
What are the superior muscles of the shoulder joint?
deltoid, supraspinatus
What are the posterior muscles of the shoulder joint?
infraspinatus, teres minor
What are the anterior muscles of the shoulder joint?
subscapularis, pectoralis major, coracobrachialis, biceps brachii
What are the inferior muscles of the shoulder joint?
latissimus dorsi, teres major, long head of the triceps brachii
What is the function of the middle deltoid?
abduction
What is the function of the anterior deltoid?
abduction, flexion, horizontal adduction, internal rotation
What is the function of the supraspinatus?
Weak abduction, weak flexion, stabilizes GH joint, important dynamic stabilizer in throwing
What is the most often injured of rotator cuff muscles?
supraspinatus
What is the function of the Infraspinatus?
External Rotation, Horizontal abduction, extension, Maintains posterior stability of numeral head in fossa
What is the infraspinatus the most powerful for?
External Rotation
The infraspinatus is effective when?
Rhomboids stabilize scapula
What is the function of the Teres Minor?
External rotation, horizontal abduction, extension
The teres minor stabilizes what?
Humeral head in glenoid fossa
The Teres minor functions similarly to the _____; same actions
infraspinatus
What is the function of the subscapularis?
Internal rotation, adduction, extension, stabilization of GH joint in anterior and inferior sections
What is the function of the pectoralis major- clavicular?
Flexion, Horizontal adduction, Internal rotation, abd/add
What is the function of the pectoralis major - sternocostal?
Internal rotation, horizontal adduction, extension, adduction
What is the function of the coracobrachialis?
Horizontal adduction, assists in flexion, assists in adduction,
What is the coracobrachialis most functional in?
horizontal adduction
What is the function of the latissimus dorsi?
Adduction, extension, internal rotation and horizontal abduction
What is one of the most important extensors?
latissimus dorsi
the latissimus dorsi has strong action in what?
adduction
What is the function of the teres major?
extension, internal rotation, adduction
The teres major is only effective when?
When rhomboids stabilize the scapula
The teres major works effectively with what?
latissimus Dorsi
What are the flexors of the shoulder joint?
anterior deltoid, coracobrachialis, pectoralis major-clavicular
What are the extensors of the shoulder joint?
Latissimus Dorsi, Posterior deltoid, teres major, pectoralis major-sternal, supraspinatus
What are the abductors of the shoulder joint?
Anterior deltoid, middle deltoid, posterior deltoid, pec major-clavicular, supraspinatus
What are the adductors of the shoulder?
Latissimus dorsi, coracobrachialis, teres major, pec major-sternal, pec major-clavicular, subscapularis
What are the internal rotators of the shoulder joint?
anterior deltoid, teres major, lat dorsi, pec major - both, subscapularis
What are the external rotators of the shoulder joint?
posterior deltoid, infraspinatus, teres minor
What are the horizontal abductors of the shoulder joint?
posterior deltoid, lat dorsi, infraspinatus, teres minor
What are the horizontal adductors of the shoulder joint?
anterior deltoid, coracobrachialis, pec major- both
What is the function of the spine?
Mechanism for maintaining upright posture that permits movement of head, neck, and trunk
Our spine is ______ stronger than a straight, solid rod
10x
The spine provides what?
Stability and mobility, support and protection, resistance and adaptation
There are ____ cervical vertebrae
7
There are ____ thoracic vertebrae
12
There are ____ lumbar vertebrae
5
The cervical vertebrae have a _____ curve
lordotic
The thoracic vertebrae have a _____ curve
kyphotic
The _____ and _____ are the last parts of the spine
sacrum and coccyx
Cervical vertebrae are _____ than thoracic and have more of a function of _____
lighter, mobility
The facets of the cervical vertebrae are _____
slanted
The cervical vertebrae favor movements in the _____ plane
sagittal
Thoracic vertebrae have facets facing ______
sagittal plane
What movements are limited in the thoracic vertebrae?
hyper-extension, rotation
What movements are possible in thoracic vertebrae?
flexion, lateral flexion, some rotation
What is the main function of the lumbar vertebrae?
bear weight of the body
The facets of the lumbar vertebrae face where?
inward
What are the movements of the lumbar vertebrae?
flexion, extension, lateral bending, and rotation
There are ____ fused sacral vertebrae
5`
_____ is extremely important in the sacral vertebrae
stability
The coccyx consists of ___ fused vertebrae
4
Vertebrae _____ in size from first cervical to fifth lumbar spine
increase
Why do vertebrae increase in size?
Because they need to support more weight
The cervical vertebrae have a _____ curve
lordotic
The thoracic vertebrae have a ____ curve
kyphotic
The lumbar vertebrae have a _____ curve
lordotic
The sacral vertebrae have a _____ curve
kyphotic
There are _____ sets of articulations in the vertebral joints
2
Vertebral arches occur in _____; ____ on either side of each vertebra
pairs, one
The articulation of vertebral bodies are ______ joints
cartilaginous joints
Intervertebral discs are _____
fibrocartilage
Intervertebral discs have a _____ and ______
outer fibrous rim, nucleus pulposus
What are the two ligaments that reinforce the vertebrae?
Anterior longitudinal ligament and posterior longitudinal ligament
Facets are _____
nonaxial
Facets are enclosed in a _____
capsule
articulation of vertebral arches permit what?
gliding
Movement of vertebral arches is determined by what?
direction the articular facets face
What makes up the atlanto-occipital articulation?
condyles of occipital bone, articular fossa of atlas
The atlanto-occipital articulation acts like a _____ ____
hinge joint
Mostion motion occurs in what regions?
cervical and lumbar
cervical motion is the motion of what?
The neck and head
Lumbar motion is the motion of the _____
lower trunk
The atlanto-occipital joint moves in what movements?
flexion and extension, slight lateral flexion
The atlantoaxial joint moves how?
rotation
The remaining cervical joint do what movements?
flexion and extension, lateral flexion, rotation
The thoracic region has what movements?
moderate flexion, limited extension, limited lateral flexion, rotation
The lumbar region has what movements?
flexion and extension, lateral flexion, limited rotation
What are the prevertebral muscles?
longus capitis & coli, rectus capitis anterior and lateralis
What are the hyoid muscles?
suprahyoids and infrahyoids
The bilateral prevertebral muscles do what?
flex head and neck
The unilateral prevertebral muscles do what?
lateral flexion, rotation to opposite side
What do the hyoid muscles do?
flex head and neck, assist with swallowing