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Unformatted text preview: uscle. 2
! ratio principle-- Muscle
muscle • Consists of thousands of muscle fibers
working in parallel and organized into a
smaller number of motor units fiber • Principles of the Motor Unit Organization myofibril Ratio Principle
Size Principle filaments ﬁne vs gross-- few ﬁbers per MU for
ﬁne (1:5) ex extra-ocular muscles
many ﬁbers per MU is gross MOTOR UNITS 1 neuron to
between 5 and
Fine versus gross? Ratio Principle! Fine motor e.g., the extra-ocular muscles G...
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- Fall '08