Biomechanics and Skeletal Muscle Notes
Biomechanics and Skeletal Muscle Notes KIN 365
Popular in Applied Biomechanics
verified elite notetaker
Popular in Department
This 3 page Class Notes was uploaded by Jess Snider on Thursday February 18, 2016. The Class Notes belongs to KIN 365 at University of Alabama - Tuscaloosa taught by Colleen Geary in Spring2015. Since its upload, it has received 33 views.
Reviews for Biomechanics and Skeletal Muscle Notes
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 02/18/16
Biomechanics & the Human Machine Biomechanics & Kinesiology Kinesiology The study of human movement In this class we will study both: Structural Kinesiology The study of muscle, bones, & joints involved in the science of movement Biomechanics The physics (mechanics) of motion exhibited or produced by biological system Human Body = Human Machine Made of 2 components: Bones muscles Bones, which come together at joints, are moved by muscle which move in such a way to provide movement necessary for bodily movement & skilled performance Bones/Skeleton 206 bones in the body serve as a system of levers & make up the human skeleton Hugely important structure 5 major functions Functions of Skeletal System 5 Major Functions of Skeletal System Protection for vital soft tissue Including heart, lungs, & brains Support to maintain posture Site of mineral storage Specifically calcium & phosphorous Site of hemopoiesis Involving blood cell formation in red bone marrow Movement Serve as point of attachment (origin & insertion) for the muscle & act as levers by which movement is possible Bones/Skeleton Can divided skeletal system into 2 planes Axial 80 bones include: skull, sternum, ribs, spinal column, & coccyx Divides right down the middle Gives body front & back Appendicular 126 bones include: all bones of upper & lower extremities, including clavicle & pelvis Divides right across the midline Gives body upper/lower extremities Types of Bones(5) Long bones: Serve as levers Ex: tibia, fibula, femur, radius, ulna, & humerus Short bones: Provide shock absorption Ex: carpals & tarsals Flat bone: Provide protection Ex: ribs, sternum, clavicle, scapula Irregular bones: Variety of purposes Ex: bones throughout spine Sesamoid bones: Provided protection & improve the mechanical advantage of musculotendinous units Ex: patella Bones from Joints Joint: Location at which two or more bones connect Articulation of two or more bones allowing various types of movement Extent & type of movement determine the name applied to the joint including: Synarthrodial Amphiarthrodial Diarthrodial Joint Types Synarthrodial Immobile joints/minimal movement Ex: cranial bones & socket of teeth Amphiarthrodial Slightly movable Ex: pubis symphysis, intervertebral disks, & ribs @ sternum Diarthrodial (aka. Synovial) Freely movable Ex: knees, shoulder, elbows, wrist, ankle Diarthrodial/Synovial joints include: Joint capsule: Surround bony ends forming the joints Line with synovial capsule Joint Cavity: Area inside the joint capsule Lubricated with synovial fluid Ligaments: Connect bone to bone Provides additional support to joint Hyaline Cartilage: Covers articular surfaces on ends of bones inside joint cavity Aids in protection from wear Skeletal Muscles Skeletal Muscles Over 600 skeletal muscles Comprise approximately 40 -50% of body weight 215 pairs of skeletal muscles usually work in cooperation with each other to perform opposite actions at the joints which they cross http://www.ivy-rose.co.uk/HumanBody/Muscles/Posterior_Muscle.php for more about skeletal muscles Can identify muscle by many different methods: Direction of fibers Size Position with each other Position within body Shape Size of origin Number of muscles in group Where they attach Cause motion of skeletal system Call these joint actions Responsible for movement of body & all of its joints Role of skeletal muscles: Skeletal muscle provide: Protection Posture & support Produce a major portion of total body heat Stabilization during contraction Assistance during contraction Contractions for movement