Human Anatomy and Physiology Lab#8

Muscle Physiology

Miriah Mertell

Muscle Identification Review

External oblique Palmaris longus

Muscle Identification Review

Gluteus mediusFlexor hallucis longusOrigin : Posterior tibiaInsertion : Distal phalanx of great toeAction : Flexes great toe; plantar flexes and inverts foot; the “push-off muscle” during walking

Review

Sarcomere Review

Neuromuscular Junction

The Motor Unit

Multiple motor unit recruitment

Control of Muscle Tension

Muscle Contraction

Isotonic Isometric

Treppe

Muscle Fatigue

• Inability of muscle to maintain force of contraction after prolonged activity

• Could be a result of:• Inadequate release of calcium ions from the SR• Insufficient oxygen• Depletion of glycogen and other nutrients

Exam Next Week

• 60 – 70 % Identification• Be able to identify muscles on muscle chart as

well as origin, insertion and action of those listed on syllabus

• Mainly use lab book and muscle list to study for identification

Due today:Lab manual: Ex. 13: Activity 3 (#’s 1 & 2), Activity 4 (#’s 1 &

2). Due online: • PowerPhys experiments: Twitch Contractions and

Summation, and Recruitment and contractions. – The activity links are located on the assignment tab on

WileyPlus (As you complete each experiment, save the lab report file as a PDF. Then, submit both PDF files to the eCourseware dropbox labeled-PowerPhys lab 7.)

• Real Anatomy: muscular is due by Thursday at 11:59 pm. (Access the Real anatomy activity on the assignment tab in WileyPlus.)