Biomechanics, Exam 3
Biomechanics, Exam 3 HSS 387, biomechanics
U of L
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This 3 page Study Guide was uploaded by Caroline Pirtle on Monday April 18, 2016. The Study Guide belongs to HSS 387, biomechanics at University of Louisville taught by Werner in Spring 2016. Since its upload, it has received 9 views. For similar materials see Exercise Physiology in Exercise Biology at University of Louisville.
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Date Created: 04/18/16
Exam 3 Wednesday, November 11, 2015 11:01 AM I. Hip (Acetabulofemoral joint) a. Bony landmarks for ORIGINS of flexors/extensors/abductors/adductors i. Flexors: anterior iliac crest, ASIS, AIIS ii. Extensors: Posterior iliac crest (glute max), ischial tuberosity (hamstrings) iii. Abductors: inferior to iliac crest iv. Adductors: pubis and its inferior ramus b Bones (sacrum, coccyx, ilium, ischium, pubis, femur) c Joint type of hip (ball and socket) d Pelvic and hip joint motions i. Planes/axes for these motions ii. Anterior/posterior/right and left lateral/right and left TRANSVERSE rotation iii. Flex/extend/adduct/abduct/internal and external rotation b PRIMARY agonists for each of the HIP motions i. Flex (iliopsoas and rectus femoris) ii. Extend (gluteus max and hamstrings) iii. Adduct (adductor anything) iv. Abductors (glut medius and minimus) II Knee (patellofemoral and tibiofemoral) a Bony landmarks and ligaments i. ACL and PCL, MCL and LCL ii. Medial femoral condyle, tibial tuberosity, head of fibula b Bones (femur, tibia, fibula, patella) i. KNOW THAT THE PATELLA IMPROVES MECHANICAL ADVANTAGE OF THE KNEE EXTENSORS ii. Fibula is strictly for attachment of the biceps femoris, not weight bearing b Joint type (hinge) c Knee motions and planes and axes i. Flex/extend/internal and external rotation WHEN FLEXED b ALL agonists for flexion/extension i. Flexion (Biceps femoris/semitendinosis/semimembranosis) ii. Extension (rectus femoris/3 vasti) II Ankle/foot (talocrural and subtalar) a Bony landmarks i. Medial and lateral malleoli as PULLEYS FOR INVERTORS/EVERTORS b Bones (tibia, fibula, talus, calcaneous, first metatarsal and phalange) c Joint types (hinge for talocrural, gliding for subtalar) d TALOCRURAL AND SUBTALAR motions i. Dorsi/plantar ii. Inversion/eversion iii. Supination/pronation** b Know about high ankle sprains and the tib/fib sprain that is likely with contact i. Syndesmotic interosseus membrane between tib/fib tears b Know that inversion sprains are more common than eversion sprains c Lower leg compartments and muscle actions i. Anterior compartment (dorsiflexors) 1. Tibialis anterior 2. Extensor hallucis longus ii Lateral compartments (evertors) 1. Peroneus longus 2. Peroneus brevis ii Superficial posteropr compartment (plantarflexors; achilles) 1. Gastrocnemius 2. Plantaris 3. Soleus ii Deep posterior compartment (plantarflexors) 1. Flexor hallucis longus 2. Tibilalis posterior b Remember the unique mature of the tibilis anterior and posterior i Antagonistis actions at the talocrural joint 1. Dorsi v planter ii Synergistic actions at the subtalar joint 1. Inversion for both II Application wise, know the squat a Down phase i Hip extensors (flexion) ii Knee extensors (flexion) iii Ankle plantarflexors (dorsiflexion) iv ALL CONTRACTING ECCENTRICALLY b Up phase i Hip extensors ii Knee extensors iii Ankle plantarflexors iv ALL CONTRACTING CONCENTRICALLY b Hip flexors do nothing but stabilize a joint in a squat
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