NUR 0012 Lecture 20 Ch. 8: Completion of Joints and Ch. 9: Muscular System Functions, Features, and NamingOutline of Last Lecture Outline of Current LectureI. Ch. 8 wrap upA. Unhappy triad injuryB. Glenohumeral jointC. Acromioclavicular jointD. Coxal jointE. Nursemaid’s elbowF. Temporomandibular jointG. Talocrural jointII. Ch. 9 muscular systemA. FunctionsB. General featuresC. Muscle nomenclatureCurrent LectureI. Ch.8 wrap upA. Unhappy Triad injury: involves ACL, MCL, and one or both of the menisci1. A lot of ACL injuries caused by excessive twisting and extension of the kneea. Skiers, soccer players, football playersB. Glenohumeral: ball and socket joint, not a very deep socket, small lip of fibrocartilage around outside (making socket bigger)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.a. Rotator cuffs: muscles that hold head of humerus in placeb. Head of humerus pulled out of glenoid cavity: disslocationC. Acromioclavicular joint (AC joint): gliding/plane joint, not very mobile held in place by a lot of ligamentsD. Coxal joint: much deeper ball and socket than the glenohumeralE. Nursemaid’s elbow: very specific injury, result of yanking on an armF. TMJ: temporomandibular joint, articulates with mandibular fossaG. Talocrural joint: articulate with talus, massive amount of ligaments anchoring ankle to footII. Ch. 9 muscular systemA. Functions1. Movement and support2. Stability and posture3. Communication4. Control of openings5. Heat productionB. Multinucleated, striatedC. General features1. Most skeletal muscles cross at least 1 joint2. Tendons attach muscle to bone3. Muscles have point of origin (more fixed/stable) and insertion (more movable)4. Synergists: groups of muscles working togethera. Prime movers: muscle that generates the most power in a groupb. Fixators5. Antagonists: groups of muscles working in opposition to each otherD. Muscles named according to:1. Location2. Shape (ex: trapezius, deltoid)3. Orientation: straight up and down (rectus muscles), muscles that run obliquely (oblique muscles), horizontal (transversus) 4. Origin and insertion: sternocleidomastoid5. Number of heads (tendonous) 6. Function:
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