Muscle                 package:nlme                 R Documentation

_C_o_n_t_r_a_c_t_i_o_n _o_f _h_e_a_r_t _m_u_s_c_l_e _s_e_c_t_i_o_n_s

_D_e_s_c_r_i_p_t_i_o_n:

     The 'Muscle' data frame has 60 rows and 3 columns.

_F_o_r_m_a_t:

     This data frame contains the following columns:

     _S_t_r_i_p an ordered factor indicating the strip of muscle being
          measured.

     _c_o_n_c a numeric vector giving the concentration of CaCl2

     _l_e_n_g_t_h a numeric vector giving the shortening of the heart muscle
          strip.


_D_e_t_a_i_l_s:

     Baumann and Waldvogel (1963) describe data on the shortening of
     heart muscle strips dipped in a CaCl_2 solution. The muscle strips
     are taken from the left auricle of a rat's heart.

_S_o_u_r_c_e:

     Baumann, F. and Waldvogel, F. (1963), La restitution
     pastsystolique de la contraction de l'oreillette gauche du rat.
     Effets de divers ions et de l'acetylcholine, _Helvetica
     Physiologica Acta_, *21*.