Muscle Fibre Arrangement Flashcards
Fusiform muscles outline
- muscle fibres are long and thin and run the length of the muscle belly
- low force
- high mobility-> allow for increased range of movement
Fusiform e.g
Biceps
Pennate muscles outline
-muscle fibres run at angles to the tendons
- low mobility
- designed for strength and power
Unipennate muscles outline
-fibres run on one side of the central tendon
- medium force
- low mobility
Unipennate muscle e.g
Semimembranosus
Tibialis anterior
Bipennate muscles outline
Fibres run on either side of the central tendon
High force
Low mobility
Bipennate muscles e.g
Rectus femoris
Multipennate muscles outline
Fibres branch out from several tendons
Very high force
Low mobility
Multipennate muscles e.g
Deltoid
Radiate/ convergent muscles outline
Fibres fan out/ radiate out from the main tendon
High strength and high mobility
Radiate/convergent muscles e.g
Pectoralis major
Trapezius
Gluteus maximus
More muscle fibres mean
More muscle fibres mean larger cross section-> greater force generated
