chapter 5, 8, Flashcards
(19 cards)
What is the term that describes a muscle contraction in which the proximal end moves toward the distal end?
reversal muscles action
Sitting with a weight in your hand, forearm pronated, elbow extended, and shoulder medially rotated, slowly move your hand out to the side and raise it.
A.What is the joint motion at the shoulder?
C.What muscle group is contracting at the shoulder?
D What type of muscle contraction is occurring at the elbow?
E.What muscle group is contracting at the elbow?
A. shoulder abduction
C. Shoulder Abductors
D. Isometric
E. elbow extensors
While lying supine with your arm at your side and with a weight in your hand, raise the weight up and over your shoulder. (Hint: Think about gravity’s effect throughout the range.)
What is the joint motion at the shoulder?
Shoulder Flexion
Identify the following in terms of open- or closed-kinetic chain activities:
Overhead wall pulleys ?
open chain activity
For a muscle to have an effective angle of pull to be a shoulder flexor and not a shoulder abductor, it would have to span the shoulder on what surface?
anterior surface
Please perform an analysis of what is happening to the length of the rectus femoris muscle at both the hip and the knee when an individual moves from a seated position to a standing position.
The rectus femoris is lengthening over the anterior aspect of the hip
contracting (shortening) over the anterior aspect of the knee.
fibers tend to be longer and thus have a greater potential for shortening and producing more range of motion
parallel muscles
fibers tend to be shorter but are more numerous per given area than parallel fibers, which means they tend to have a greater strength potential but a smaller range-of-motion potential than parallel-fibered muscles.
Oblique muscles
name all the parallel muscles
Straps Muscles- are those that are long and thin with fibers running the entire length of the muscle.
Fusiform muscles - has a shape similar to that of a spindle. It is wider in the middle and tapers at both ends where it attaches to tendons.
rhomboidal muscles- is four-sided, usually flat, with broad attachments at each end.
triangular - flat and fan-shaped, with fibers radiating from a narrow attachment at one end to a broad attachment at the other (
Identify the structures that make up the shoulder girdle, the shoulder joint, and the shoulder complex.
shoulder girdle = clavicle, scapula
shoulder joint = scapula, humerus,
shoulder complex = sternum, scapula, clavicle, humerus, and rib cage
what direction is the landmark moving if the scapula is rotating upwardly?
scapula moves away from vertebral column
Which shoulder girdle motions are mostly linear?
retraction and protraction
elevation and depression
Which type of scapular motion can only happen in conjunction with glenohumeral joint motions?
angular motions
How is shoulder joint motion affected by the absence of scapulohumeral rhythm?
without shoulder girdle movement cannot raise above
Raising your hand over your head requires the combined action of which three shoulder girdle muscles?
upper trapezius, serrates anterior, and lower trapezius
Name and define the biomechanical term used to describe the combined action in question 10.
Force couple muscles pull different direction
Which joints of the shoulder complex produce movement when your hand is reached over your head?
the SC joint, AC joint, and Scapulothoracic articulation
Starting at the inferior angle and going clockwise, name the shoulder girdle muscles that attach to the posterior surface of the right scapula.
lower trapezius
Rhomboids
Upper trapezius
Levator Scapula
The pectoralis minor muscle is deep to what muscle?
Pec major
