A 20-Year-Old Man Has His Spinal Cord Severed at T6

Short Answer

A 20-year-old man has his spinal cord severed at T6 in an automobile accident. He devises a method to distend the rectum to initiate the rectosphincteric reflex. Rectal distention causes which of the following? $\begin{array}{llcc}\underline{\text { Relaxation of Internal }}&\underline{\text {Contraction of External}}&\underline{\text { Contraction}} \\\underline{\text { Anal Sphincter}}&\underline{\text {Anal Sphincter}}&\underline{\text { of Rectum}}\end{array}$

A. $\begin{array}{llcc}\quad\text { No } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { No }\end{array}$
B. $\begin{array}{llcc}\quad\text { No } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}$
C. $\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}$
D. $\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { No }\end{array}$
E. $\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { Yes}&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}$