Chap 10 Flashcards
what is the normal end feel for shoulder movements?
The normal end feel for all shoulder joint motions is firm
Anterior Deltoid Muscle
O - Lateral third of the clavicle
I - Deltoid tuberosity
A - Shoulder abduction, flexion, medial rotation, and horizontal adduction
N - Axillary nerve (C5, C6)
middle deltoid muscle
O - Lateral third of the clavicle
I - Deltoid tuberosity
A - Shoulder abduction, flexion, medial rotation, and horizontal adduction
N - Axillary nerve (C5, C6)
Posterior Deltoid Muscle
O - Spine of scapula
I - Deltoid tuberosity (same as anterior deltoid muscle)
A - Shoulder abduction, extension, hyperextension, lateral rotation, horizontal abduction
N - Axillary nerve (C5, C6)
Pectoralis Major Muscle, Clavicular and Sternal Portions
O - Medial third of clavicle, sternum, and costal cartilage of ribs 1 to 6
I - Lateral lip of the bicipital groove of humerus
A - Shoulder adduction, medial rotation, and horizontal adduction
N - Lateral and medial pectoral nerves (C5, C6, C7, C8, T1)
Putting your billfold in your left back pocket with your left hand
Shoulder joint motion ____________________
Shoulder girdle motion ___________________
a. Shoulder hyperextension and medial rotation
b. Scapular tilt and protraction
Reaching up to get hold of your seat belt (driver’s side with left hand)
Shoulder joint motion ____________________
Shoulder girdle motion ___________________
a. Shoulder abduction and lateral rotation
b. Scapular upward rotation and retraction
Fastening your seat belt with your left hand
Shoulder joint motion ____________________
Shoulder girdle motion ___________________
a. Shoulder adduction and medial rotation
b. Scapular downward rotation and protraction
Placing a book on the upper bookshelf
Shoulder joint motion ____________________
Shoulder girdle motion ___________________
a. Shoulder flexion
b. Scapular upward rotation and protraction
Tucking and holding a book under your arm
Shoulder joint motion ____________________
Shoulder girdle motion __________________
a. Shoulder adduction
b. Scapular downward rotation
Reaching over top of the head to touch the lobe of the contralateral ear
Shoulder joint motion ____________________
Shoulder girdle motion __________________
a. Shoulder abduction
b. Scapular upward rotation
The backstroke in swimming involves what collective joint motion at the shoulder joint?
Circumduction
Lie prone on a table with your arm over the edge and with your shoulder flexed 90 degrees, elbow extended, and a weight in your hand (Fig. 10-24A). Lift the weight away from the table in a sideward motion (Fig. 10-24B).
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
a. Shoulder horizontal abduction
b. Concentric contraction of shoulder horizontal abductors
c. Posterior deltoid, infraspinatus, teres minor
Repeat the exercise in Question 1, except flex the elbow to 90 degrees as you lift the weight up.
a. Does flexing the elbow shorten the force arm?
b. Does flexing the elbow shorten the resistance arm?
c. Why is this exercise easier than the one in Question 1?
a. No
b. Yes
c. With a shortened resistance arm, there is less resistance that the force needs to move.
Lie prone as shown in Figure 10-24, except with the starting position of the arm in anatomical position. Move arm to 90 degrees in the sagittal plane.
a. What is the joint motion?
b. What type of contraction is occurring?
c. Name the prime movers of this motion.
d. About which axis is this motion occurring?
a. Shoulder flexion
b. Eccentric contraction
c. Latissimus dorsi, posterior deltoid, teres major, sternal part of pectoralis major
d. Frontal axis
Stand with your arm adducted at the side of your body, elbow flexed to 90 degrees, and hold a loop of elastic tubing whose other end is anchored in front of you at the same level as your hand. In a sawing motion (back and forth motion like you are sawing wood), pull back on the tubing.
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
a. Shoulder hyperextension
b. Concentric contraction of shoulder hyperextensors
c. Latissimus dorsi, posterior deltoid
Return to the starting position of the exercise in Question 3.
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
a. Shoulder flexion
b. Eccentric contraction of shoulder hyperextensors
c. Latissimus dorsi, posterior deltoid
Stand and hold a cane or weight bar in both hands.
a. With your hands approximately 12 inches apart and elbows extended, raise the bar. What shoulder motion is occurring?
b. With your arms as far apart as possible and elbows extended, raise the bar. What predominant shoulder motion is occurring?
c. In what plane is the motion in part (b) occurring? (Hint: It is not sagittal, frontal, or transverse.)
a. Shoulder flexion
b. Shoulder abduction
c. Plane of the scapula
Lie on your right side with your left elbow flexed to 90 degrees and holding a weight in your hand. Keep your left elbow resting on the left side of your body.
First part: Roll the weight up toward the ceiling.
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
First part:
a. Shoulder lateral rotation
b. Concentric
c. Shoulder lateral rotators: infraspinatus, teres minor, posterior deltoid
Lie on your right side with your left elbow flexed to 90 degrees and holding a weight in your hand. Keep your left elbow resting on the left side of your body.
Second part: Hold for the count of five.
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
Second part:
a. Shoulder lateral rotation
b. Isometric
c. Shoulder lateral rotators
Lie on your right side with your left elbow flexed to 90 degrees and holding a weight in your hand. Keep your left elbow resting on the left side of your body.
Third part: Slowly return to the starting position.
a. What is the shoulder joint motion?
b. What type of contraction (isometric, concentric, eccentric) is occurring?
c. What muscles are prime movers in this shoulder joint motion?
Third part:
a. Shoulder medial rotation
b. Eccentric
c. Shoulder lateral rotators
The ability of this gymnast (Fig. 10-25) to hold the position in this iron cross maneuver may be limited by the strength of which group of shoulder joint muscles?
Shoulder adductors
As a person performs a sliding board transfer (Fig. 10-26):
a. Identify the shoulder joint muscles that must contract to lift the body up off the supporting surface.
b. Are these muscles performing a normal contraction or reverse muscle action?
c. Identify the shoulder girdle muscles that must contract to lift the body up off the supporting surface. Are these muscles performing a normal contraction or working through reverse muscle action?
a. Latissimus dorsi and pectoralis major
b. Reverse muscle action
c. Reverse muscle action of the lower trapezius and pectoralis minor
