Lights, Camera, Action
Name 3 muscles which help with scapular upward or downward rotation
Upper trap, lower trap, levator scapula, serratus anterior, rhomboids, pec minor
Upward- traps & SA
Downward- levator, rhomboids, & pec minor
In order for the elbow to pronate and supinate, two main joints are involved. Name the 2 joints, and the bony concave articulation that "spins" at the elbow joint to allow this to happen.
Distal and proximal radioulnar joints; Radial head
Name and demonstrate all osteokinematic movements of the MCP joint of the thumb
Flex-ext, abd-adduction, opposition
During wrist flexion and extension, which is the concave and convex structures when discussing arthrokinematics?
Concave- radius
Convex- carpals (proximal row)
Lateral - wrist extensors
Medial - wrist flexors
This muscle group provides stabilization of the shoulder during overhead movements. Name all of the muscles in this group and the main osteokinematic action for each muscle.
Hint: SITS
Supraspinatus, infraspinatus, teres minor, subscapularis
Supra- abduction; Infra- ER; Teres - ER
Subscap- IR, adduction
Name the 4 joints which allow for the shoulder joint to move freely, and which is NOT a true joint?
Scapulothoracic joint (not true joint), sternoclavicular, acromioclavicular, glenohumeral
The anatomical snuffbox is formed by the scaphoid bone as the base, and 2 muscles of the thumb outline the medial and lateral borders. Name these muscles
Extensor pollicis longus, abductor pollicis longus
During radial and ulnar deviation, which bone forms the "axis" for arthrokinematics?
Capitate
The function of the flexor digitorum muscles differs based on their attachment points- name the 2 different muscles and where they insert to allow for their slight difference in functions in the hand.
Flexor digitorum superficialis attaches at the base of the middle phalanx, FDP attaches at the base of the distal phalanx
This triangular muscle assists with elbow extension, is innervated by the Radial nerve, and sits near the lateral epicondyle of the humerus.
Anconeus
When the elbow creates an angle GREATER than 15 degrees due to a more lateral distal radioulnar joint, this is called:
cubitus valgus
Name 2 muscles of the thumb that live on the dorsal aspect of the hand.
Given what you know about the concave-convex rule, as well as anatomy, if the carpal bones roll ulnarly, then slide occurs in which direction?
Radially
Name 1 muscle which attaches to the Greater tubercle, and one which attaches to the Lesser tubercle
Greater - supra, infra, teres minor
Lesser- subscap
This muscle is not present in all of the population- what is it and how can you tell if an individual has this muscle?
Palmaris longus, make a fist and perform some slight wrist flexion
Name all 4 joints distal of the radiocarpal joint (not including the thumb)
Hint: Do not include the midcarpal and intercarpal joints.
CMC (carpometacarpal)
MCP (metacarpal-phalangeal)
PIP (promximal interphalangeal)
DIP (distal interphalangeal)
Most muscles of the thenar eminence run through the carpal tunnel. Therefore, most muscles of the thenar eminence are innervated by what nerve?
Median
During elbow flexion, the humeroulnar and humeroradial joints move in the same way with arthrokinematics. Describe the arthrokinematic movement for these joints during flexion
Anterior roll, anterior slide
Two muscles discussed in class that perform scapular retraction are also two muscles that have attachments (origins) on the ribs. What are these muscles and what are their other attachments? (insertions)
SA- anterior surface of medial border of scapula
Pec minor- coracoid process
There are 3 main muscles in the forearm that perform pronation and supination- what are they and what innervates them?
Pronator teres, pronator quadratus (median n.)
Supinator (radial n.)
When striking a nail with a hammer, what motion is being performed? Name 1 agonist and 1 antagonist muscle for this action.
Ulnar deviation- FCU & FCR
Ulnar and radial collateral ligaments live on the lateral and medial aspects of the elbow respectively. The thumb also has these ligaments. In a gamekeeper's (or Skier's) thumb injury, which ligament is impacted and at which joint?
Ulnar collateral ligament, 1st MCP
During glenohumeral external rotation, describe the arthrokinematic movement occurring, as well as the concave and convex anatomy, and what plane/axis the joint is moving in/about during this motion.
Convex humeral head moving on the concave glenoid.
Posterior roll, ANTERIOR GLIDE
Transverse, longitudinal
The two main 2-joint muscles of the UE are antagonists of one another. Name their distal attachments and their innervartions
Biceps- radial tuberosity of radius (musculocutaneous n.)
Triceps- olecranon process of ulna (radial n.)