fascicle arrangement

very important

how many patterns

5

what does arrangement affect

power and range of motion

5 patterns

parallel, fusiform, circular, pennate, triangular

subcategories of pennate

unipennate, bipennate, multi pennate

parellel

goes straight down along muscle. stops at flat tendon

fusiform

wider spindle shaped parallel

circular

circle with hole in middle

pennate

short compared to muscle. attaches obliquly to tendon

unipennate

only on one side of tendon

bipennate

both sides of tendon

multipennate

attach obliquely from mayt directions to several tendons

triangular

spread over broad area gives muscle triangular appearance

parallel example

sternohyoid

fusiform example

exdigastric

circular example

orbicularis oculi

unipennate example

extensor digitorum longus

bipennate example

rectus femurus

multipennate example

deltoid

triangular example

pectoralis major