KNES 210 Lecture Notes - Lecture 4: Triceps Brachii Muscle, Biceps, Vastus Intermedius Muscle

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orangereindeer556

14 Nov 2016

School

University of Maryland

Department

Kinesiology

Course

KNES 210

Professor

Dr.Lindle

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Document Summary

Smooth muscles: involuntary, controls internal movements. Blood vessels, dilate or constrict to control flow of the blood. Skeletal muscles: voluntary, move your bones, you have more than 400 voluntary muscles. Number of heads or number of muscles within a complex: biceps brachii: 2 heads, long/short, triceps brachii: 3 heads, lateral, long, middle, quadriceps: 4 parts, rectus femoris, vastus lateralis, vastus medialis and vastus intermedius. Size: gluteus maximus (largest gluteal muscle), gluteus medius, gluteus minimus. Action: adductor longus, adductor magnus, adductor brevis, pronator teres. Shape: trapezius (trapezoid, deltoids (deltoid, means triangular) Direction of fibers (which way do the fibers run?) Types of muscle actions: no visible change in length, external oblique, internal oblique, transverse abdominis. Isometric muscle exerts a force equal to the resistance force. Isotonic muscle length changes: concentric muscle exerts force and visibly shortens, eccentric muscle exerts a force and muscle lengthens. Isokinetic same velocity: speed of contraction is controlled. Agonist: prime mover; responsible for the movement.

Related Questions

For muscle anatomy identification, you will need to identify thename of the muscle, the origin, the insertion, and the action ofthe muscle labeled on the models. You can find origins/insertionsin your lab manual, but you can also find the specific origins andinsertions we are looking for on the laminated cards for the claymodeling in lab. For actions, please identify the primary action ofthe muscle. For example for the gluteus maximus, the primaryactions are extension and rotation of the hip and maintain kneeextension. Many muscles also perform other actions in which theyare supporting other muscles. You do not have to include these,just focus on primary action. Please make sure you also know theindividual muscles of the iliopsoas, quadriceps, hamstrings, andpelvic floor.

iliopsoas (psoas major and iliacus)

gluteus maximus

gluteus medius

sartorius

adductor longus

adductor magnus

gracilis

quadriceps femoris (rectus femoris, vastuslateralis, vastus medialis, vastus intermedius)

hamstrings (biceps femoris, semitendinosus,semimembranosus)

pelvic floor (levator ani and external urethralsphincter)- NO origins and insertions assessed for thesemuscles, just identification on models and actions.

Flexor digitorum longus

fibularis longus (peroneus longus)

extensor digitorum longus

gastrocnemius

soleus

extensor hallucis longus

tibialis anterior

Also find: patellar ligament, calcanealtendon

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KNES 210 Lecture Notes - Lecture 4: Triceps Brachii Muscle, Biceps, Vastus Intermedius Muscle

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