D170 W15 Muscles Williams

Describe how a muscle’s position as it crosses a joint determines a muscle’s action. What movements will a muscle produce if it crosses a joint anteriorly, posteriorly, laterally, or medially?

What are the seven criteria for naming skeletal muscles?

What are the compartments of the upper limb? Of the lower limb? What actions do they perform?

Complete the following tables about the muscles of the body. These are the muscles that you will be responsible for identifying, as well as for being able to describe their origins, insertions, and actions. You can find this information from the tables between pages 274 and 332 of the book. While you are not required to know all (600!) muscles of the body, you should be able to infer

D170 W15 Muscles Williams

information about them given their name and location relative to joints. (see “check your understanding” questions number 9 and 11 on page 270 for examples)

Muscles of the temporomandibular joint (TMJ) and mastication (chewing)

What types of movements does the TMJ allow?

Muscle Origin Insertion ActionMasseterTemporalisBuccinatorMedial pterygoidLateral pterygoidDigastric

Muscles of the anterior and posterior thorax: movement of the scapula

What types of movements can the scapula undergo?

D170 W15 Muscles Williams

Muscle_Description Origin Insertion ActionPectoralis minorSerratus anteriorSubclaviusTrapeziusLevator scapulaeRhomboids

D170 W15 Muscles Williams

Muscles of the shoulder (glenohumeral) joint that move the arm

What types of movements does the shoulder joint allow?

Muscle_Description Origin Insertion ActionPectoralis majorDeltoidLatissimus dorsiTeres majorSubscapularisSupraspinatusInfraspinatusTeres minorCoracobrachialisBiceps brachii

Muscles of the elbow joint that move the forearm

D170 W15 Muscles Williams

What types of movements does the elbow joint allow?

Muscle Origin Insertion ActionTriceps brachiiAnconeusBiceps brachiiBrachialisBrachioradialis

Muscles of the knee joint that move the leg

What types of movements does the knee joint allow?

Muscle Origin Insertion ActionSartoriusQuadricepts femorisRectus femorisVastus lateralisVastus medialis

D170 W15 Muscles Williams

Vastus intermediusHamstringsBiceps femorisSemitendinousSemimembranosusPopliteus (See Fig 11.27c, g)

Muscles of the abdominal wall

What types of movements do the abdominal muscles perform?

Muscle Origin Insertion ActionExternal obliqueInternal obliqueTransversus

D170 W15 Muscles Williams

abdominisRectus abdominisPsoas major (see 11.22 a)