Let’s Smoke these Joint…Mechanics
Low ligament tension and low joint congruency describe this joint position.
What is open-packed (loose-packed) position?
From looking at the cadaver alone, this is how you can distinguish the lateral and medial pectoral nerve.
What is the medial nerve pierces the pec minor?
This muscle is the only medial rotator of the rotator cuff.
What is the subscapularis?
The hip joint is this class of lever.
What is a third class lever?
This nerve innervates the levator scapulae, rhomboid minor, and rhomboid major.
What is the dorsal scapular artery?
Full 180 degrees of flexion or abduction requires this type of scapular motion.
The superior transverse scapular (suprascapular) ligament helps to distinguish these two important structures.
What are the suprascapular artery and nerve?
These muscles attach to the intertubercular groove.
What are Teres Major, Latissimus Dorsi, and Pec Major?
When kicking a soccer ball, the kicking leg is acting in this kinematic chain.
What is the open kinematic chain?
The muscles innervated by the nerves originating in the posterior cord have this in common.
What is extension?
These are the different joint classifications based on structural components.
What are fibrous, cartilaginous, and synovial joints?
You accidentally sever a branch of the brachial plexus while dissecting your cadaver, but find that it originates in the posterior cord near the inferior and superior subscapular nerves. From this information, you know that it must be this nerve.
What is the thoracodorsal nerve?
These muscles attach to the clavicle.
This muscle tension concept explains why extending the hip with the knee flexed produces less force than when extending the hip with the knee extended. This is the muscle group experiencing this concept.
What is active insufficiency. What are the hamstrings?
Your patient sustains a spiral fracture that stretches supero-medially at the center of the lateral border of their humerus endangering this nerve.
What is the radial nerve?
These structural components make the sternoclavicular joint stable.
what are the costoclavicular ligament, ant/post sternoclavicular ligaments, interclavicular ligament, and articular disc
You are dissecting the posterior arm and separate the long and lateral head of the triceps, these are the structures that can be seen.
What are the axillary nerve, posterior circumflex numeral artery, radial nerve, and profunda brachii artery?
These are the muscles covered (thus far) that have different groupings or ’heads’ that possess different functions.
What are traps, deltoids and pectoralis major?
While performing an isometric contraction this is the relationship between the internal and external torque.
What is equal?
If a patient shows functional deficits whole abducting and externally rotating their shoulder, this nerve‘s function is impaired.
*Daily Double*
What is the axillary nerve OR suprascapular nerve?
These synchronized osteokinematic movements at the SCJ and ACJ respectively combine to perform scapular elevation at the STJ.
What is clavicular elevation and scapular downward rotation?
These are three characteristics you could use to verify whether you are looking at the posterior circumflex humeral artery
What is, thicker diameter than ACHA, located in the third section of the axillary artery, and posteriorly wraps around the humerus with the axillary nerve.
A patient comes in and you see his diagnosis is suprascapular nerve damage. These motions will be impacted, and these muscles may be compensating for their deficiencies.
What is external rotation and shoulder abduction? + What are the deltoid (posterior and lateral) and teres minor?
If someone is performing a 1 rep max successfully, the relationship between force and velocity of the concentric contraction is described as this (Think of the force vs. velocity curve)
What is high force and low velocity?
A patient comes in and you see their diagnosis and a pinched nerve at C8. To double Check this diagnosis, you palpate this area of their skin and instruct them to perform this action.
What is palpate the fifth digit and instruct patient to flex fingers (make a fist)?