USAHS Biomechanics Unit 7 Exam Questions with 100% Correct Answers
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Course
USAHS Biomechanics
Institution
USAHS Biomechanics
USAHS Biomechanics Unit 7 Exam Questions with 100% Correct Answers
What muscles assist with clavicular elevation? - Answer- Upper trapezius and sternocleidomastoid
What muscles assist with clavicular depression? - Answer- Subclavius and pectoralis major
What muscles assist with scapular ele...
USAHS Biomechanics Unit 7 Exam
Questions with 100% Correct
Answers
What muscles assist with clavicular elevation? - Answer- Upper trapezius and
sternocleidomastoid
What muscles assist with clavicular depression? - Answer- Subclavius and pectoralis
major
What muscles assist with scapular elevation? - Answer- - upper trapezius
- levator scapulae
- rhomboids major and minor
What muscles assist with scapular depression? - Answer- - lower trapezius
- pectoralis minor
- latissimus dorsi
What muscle(s) assist with anterior clavicular rotation and translation (slide)? - Answer-
Pectoralis major with shoulder extension (eccentrically)
What muscles assist with posterior clavicular rotation and translation (slide)? - Answer- -
upper trapezius
- sternocleidomastoid
- pectoralis major (during flexion)
What muscles assist with scapular abduction (protraction)? - Answer- Serratus anterior
and pectoralis minor
What muscles assist with scapular adduction (retraction)? - Answer- Middle trapezius
and rhomboids major & minor
What muscles assist with upward scapular rotation? - Answer- - upper trapezius
- lower trapezius
- serratus anterior
What muscles assist with downward scapular rotation? - Answer- - levator scapulae
- rhomboids major and minor
- pectoralis minor
, How do the muscles involved in upward and downward scapular rotation assist with
these movements? - Answer- These muscle groups act together to form a force couple
to produce the movement
What muscle neutralizes the protraction force of the serratus anterior during scapular
upward rotation? - Answer- Middle trapezius
What is the significance of GH muscles having a proximal attachment on the movable
scapula? - Answer- These muscles act to stabilize the scapula so that the attaching
muscles can move the humerus
(T/F): stability of the scapula means that the proximal attachment is rigid and immobile.
- Answer- False
What does stability of the scapula indicate? - Answer- The proximal site of attachment is
less mobile than the distal site (NOT rigid and immobile)
What three muscles function to stabilize or move the scapula in a controlled way? -
Answer- 1. trapezius
2. serratus anterior
3. rhomboids major and minor
What osteokinematic movements take place at the glenohumeral joint? - Answer- -
flexion and extension
- hyperextension
- vertical adduction and abduction
- internal (medial) rotation and external (lateral) rotation
What muscles assist in GH flexion? - Answer- - coracobrachialis
- anterior deltoid
- long and short heads of the biceps
- pectoralis major (when arm is hyperextended)
- latissimus dorsi (when arm is hyperextended)
What muscles assist in GH extension? - Answer- - posterior deltoid
- pectoralis major (when arm is flexed)
- latissimus dorsi (when arm is flexed)
- teres major
- long head of triceps
What muscles assist in GH hyperextension? - Answer- Posterior deltoid and long head
of triceps
What muscles assist in GH vertical abduction? - Answer- - deltoid (anterior, middle,
posterior)
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