Muscle Line of Pull and Muscle Function Role_teaching

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Brigham Young University, Idaho *

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359

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Health Science

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Apr 28, 2024

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docx

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HRHP 359 Lab 3 - Muscle Line of Pull & Muscle Roles Name: Abigail Rex Outcomes : Students will: 1. Apply muscle line of pull principles to determine what movement(s) a muscle is capable of performing when it contracts concentrically. 2. Apply vector resolution to solve the movements a diagonally oriented muscle is capable of performing. Instructions : Part 1 : Line of Muscle Pull . Specific to the muscles shown, identify the joint(s) the muscle crosses, the “where” and “how” the muscle crosses the joint(s). Then, list the actions the muscle is capable of performing when it contracts concentrically ( DO NOT USE YOUR FLASHCARDS OR ANY OTHER REFERENCE MATERIAL ) Pectoralis Major: Sternal Head List all that apply : Where (ant., post., sup., inf., superolaterally, inferomedially) the muscle crosses the joint. anterior, medial and inferior to the joint How (vertically, horizontally, diagonally) the muscle crosses the joint. diagonally Name all the movements/actions this muscle is capable of performing based on its line of pull. shoulder adduction, horizontal adduction, flexion, extention Teres Major List all that apply : Where (ant., post., sup., inf., superolaterally, inferomedially) the muscle crosses the joint. posterior, medial and interior to the joint How (vertically, horizontally, diagonally) the muscle crosses the joint. diagonally Name all the movements/actions this muscle is capable of performing based on its line of pull. Internal rotation, extension, scapular adduction Part 2 : Vector Resolution . On the muscles shown below, draw in the muscle’s line of pull vector and then resolve the vector by drawing in the resultant vectors . (Using the “insert arrow function in Word is also acceptable.) Then, list the movements demonstrated by those resultant vectors. Movement represented by vertical vector: Shoulder extension Movement represented by horizontal vector: Shoulder adduction, horizontal abduction Other movements determined by line of pull: Internal rotation Movement represented by vertical vector: Scapular elevation Movement represented by horizontal vector: Scapular adduction Other movements determined by line of pull: Upward rotation
Part 3 : Specific to the illustration listed below, answer the questions in the box. (Instructor will help with the process) 1. Identify the answers for the 4 steps in determining the stabilizer muscle . Determine that involved muscle/muscle group. Shoulder abductors Bone/segment the involved muscle originates, scapula/pelvis. scapula Determine what movements the agonist would cause on the proximal segment. Downward rotation, depression, abduction Stabilizer = muscles that perform the actions opposite. Upper trapezius 2. Identify the direction of the arthrokinematic motions (anterior, posterior, superior, inferior, medial, lateral) Upward Phase : Roll: __ superior _______ _ 2Glide: ____ inferior ___________ Downward Phase : Roll: Inferior Glide: Superior 3. Movement occurs in which plane of motion? Frontal 4. Movement occurs around which axis? Sagittal Part 4 : Specific to the illustration listed below, answer the questions in the box. This part is graded: 5 pts (1/2 pt for each blank) 1. Identify the answers for the 4 steps in determining the stabilizer muscle . Shoulder flexors Scapula Scapular abduction, depression, upward rotation Stabilizer = rhomboids 2. Identify the direction of the arthrokinematic motions (anterior, posterior, superior, inferior, medial, lateral) Cole Anderson Concentric Phase : Roll: _____anterior______ Glide: ____posterior ______ Eccentric Phase : Roll: ______Posterior ____ Glide: _____anterior ______ 3. Movement occurs in which plane of motion? ________sagittal ________________ 4. Movement occurs around which axis? ____________frontal_________________ Part 5 : Teaching a concept helps solidify your knowledge. For this part, you must “successfully” teach the 4-step process of how we determine the “stabilizer” for a particular activity. You will choose the activity/exercise that you will teach. The first person you teach the 4-step process must be either a faculty member who teaches Intro to Kinesiology and Biomechanics, a TA for the class , or a tutor for the class . You must then obtain their signature verifying that you correctly taught them the process. Afterwards, teach 2 more people the steps to identifying a “stabilizer”. This part is graded: 5 pts for completion and signature Chosen Activity/Exercise : ______________ Pull ups _______________________________________ Faculty/TA/Tutor Signature : _____________ Ashlyn Winters ________________________________________________ (3 pts) Chosen Activity/Exercise : __________ biceps curls ___________________________________________ Signature : ________________ Jaden Downs _____________________________________________ (1 pt)
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