Muscles involved
What muscles are involved in the shoulder region during this phase of movement?
Flex: Anterior deltoid, Pectoralis Major, Coracobrachialis, Pec major (clavicular) synergistically
Internal rotation: pec major, subscapularis, teres minor, and latissimus dorsi synergistically
What are the arthrokinematics of the shooting elbow?
roll and slide in same direction and it is open chained motion
What is the plane and axis of the shoulder motion?
Sagittal plane/ mediolateral axis
Explain what is happening at the scapula? Be specific!
Scapulohumeral rhythm: the muscles Serratus anterior, upper and lower traps are going initiate the movement of the ST joints, the SC joint is first with 25* elevation of the clavicle, then the AC joint finishes with 35* upward rotation to total 60* motion for upward rotation of the scapula. Then the costoclavicular ligament gets taut and limits further motion. Then, the GH joint finishes the motion with the rest 120* flexion. Don’t forget, the muscles acting as a neutralizing synergy to maintain the joint. For ABduction and flexion, when the deltoid and supraspinatus are acting on the shoulder, the infraspinatus, teres minor, and subscapularis are all working to neutralize the joint.
what type of muscle contraction is seen at the shooting wrist?
Shooting hand Wrist extension→ wrist hyperextension
eccentric
What muscles are involved in the shooting wrist during this phase?
Flexor carpi radialis, Flexor carpi ulnaris, Palmaris longus
Explain the arthrokinematics of the shoulder joint
GH joint. Convex moving on a concave surface.
Roll n slide opp directions
What is the motion that is seen at the shooting wrist and what plane and axis does this occur in?
radial deviation → ulnar deviation
Sagittal plane/ mediolateral axis
What are the muscles acting on the shooting forearm and how are they acting to help it maintain position throughout the movement?
Pronator Quadratus, Pronator Teres
They are working isometrically
what type of muscle contraction is seen at the shoulder joint?
Concentric for shoulder flexion and isometric contraction for the slight internal rotation
What muscles are involved in the fingers during this movement?
Flexor digitorum superficialis, flexor digitorum profundus
AB: Dorsal interossei, abductor digiti minimi
describe the arthrokinematics of the shooting wrist joint
(Radiocarpal, ulnocarpal, and distal radioulnar joint)
In open chain movement, the convex surfaces of the scaphoid and lunate move on the concave surfaces of the radius and ulna.
Roll and slide in opposite directions!
explain the osteokinematics of the elbow joint
ELBOW humeroradial and humeroulnar joint
roll and slide same direction w/ stable humerus
concave on the convex surface
What action is seen at the fingers during this phase?
MCP very slight flexion to hold the ball→ MCP flexion for shooting hand
Finger abduction throughout the movement
Thumb opposition
What type of muscle contraction is seen at the neck?
concentric
What type of motion is seen at the neck and what muscles are producing that motion?
Flexion→ extension
Splenius capitus and cervicis
Erector spinae → spinalis, longissimus, iliocostalis
Describe the arthrokinematics at the finger joints
(MCP, PIP, DIP joints, Joint arthrokinematics roll and slide in the same direction - concave on convex. - proximal phalanx moves and slides in the same direction in relation to the metacarpals
Forearm pronated throughout the movement
Frontal plane/ anterior posterior axis
What motion is happening with the stabilizing wrist and what are the muscles roles?
forearm is in a neutral position .
the muscles are working as neutralizers.
Biceps brachii, brachioradialis, brachialis concentrically contract
what muscles are involved at the shooting forearm?
Pronator Quadratus, Pronator Teres (assists with flexion)
What are the joints involved at the thumb?
MP, IP, CMC joint
What are the osteokinematics of the scapula?
protraction Transverse plane with a vertical axis
Upward rotation is frontal plane with anteroposterior axis
What are the muscles acting on the thumb?
Extensor
CMC & IP:Extensor pollicis longus (extrinsic)- the only IP extensor
CMC: Abductor pollicis longus (extrinsic)
CMC: Extensor pollicis brevis (extrinsic)
Thumb ABduction:
Abductor pollicis longus (extrinsic)
CMC MCP: Abductor pollicis brevis (intrinsic)
What type of muscle contraction is seen at the shooting forearm?
concentric contraction