Deck 24: Muscles of the Vertebral Column, Abdominal Wall, and Pelvic Floor

Question 1

Which of the following muscles of the vertebral column are unique, in that they originate on the iliac crest?

A) Iliocostalis group
B) Semispinalis group
C) Semispinalis thoracis
D) Longissimus group
E) Quadratus lumborum

Answer 1

E

Question 2

The deep muscles of the back flex the vertebral column.

Answer 2

False

Question 3

The linea alba is a muscle of the pelvic floor.

Answer 3

False

Question 4

Which muscles form the outermost layer of the layered abdominal wall muscles?

A) Internal oblique
B) External intercostal
C) Transversus abdominis
D) Rectus abdominis
E) External oblique

Question 5

Which of the pelvic floor muscles inserts only on the coccyx?

A) Ischiocavernosus
B) Coccygeus
C) Levator ani
D) Bulbospongiosus
E) Superficial transverse perineal muscle

Question 6

Which of the following muscles is NOT a muscle of the abdominal wall?

A) Rectus abdominis
B) External oblique
C) Transversus abdominis
D) Internal intercostal
E) All of these are muscles of the abdominal wall.

Question 7

Which muscle(s) of the pelvic floor is/are responsible for erection of the penis and clitoris?

A) Bulbospongiosus only
B) Superficial transverse perineal muscle and coccygeus
C) Ischiocavernosus only
D) Bulbospongiosus and ischiocavernosus
E) Coccygeus only

Question 8

Which muscles form the pelvic diaphragm?

A) Bulbospongiosus and Ischiocavernosus
B) Levator ani and coccygeus
C) Levator ani and ischiocavernosus
D) Coccygeus and bulbospongiosus
E) Superficial transverse perineal muscle and bulbospongiosus

Question 9

Which of the following correctly lists the erector spinae muscles, from lateral to medial?

A) Iliocostalis group, longissimus group, spinalis group
B) Semispinalis thoracis, semispinalis cervicis, semispinalis capitis
C) Spinalis group, longissimus group, iliocostalis group
D) Quadratus lumborum, semispinalis thoracis, iliocostalis group
E) Semispinalis capitis, semispinalis cervicis, semispinalis thoracis

Question 10

Which of the abdominal wall muscles help(s) flex the vertebral column?

A) Rectus abdominis
B) Internal oblique
C) Transversus abdominis
D) External oblique
E) All of these abdominal wall muscles help flex the vertebral column.

Question 11

Which of the following muscles associated with the vertebral column is the most superior?

A) Semispinalis thoracis
B) Multifidus
C) Quadratus lumborum
D) Serratus posterior superior
E) Splenius capitis

Question 12

The diamond-shaped area between the lower limbs is called the perineum.

Question 13

Which muscle of the pelvic floor acts as a sphincter in the vagina and anal canal?

A) Levator ani
B) Ischiocavernosus
C) Coccygeus
D) Superficial transverse perineal muscle
E) Bulbospongiosus

Question 14

The muscles of the pelvic floor are almost entirely innervated by the pudendal nerve.

Question 15

The anterior portion of the perineum is called the

A) anal triangle.
B) genital opening.
C) urogenital triangle.
D) external anal sphincter.
E) pelvic diaphragm.

Question 16

Unilateral contraction of the muscles of the erector spinal group results in

A) extension of the vertebral column.
B) lateral flexion of the trunk.
C) flexion of the head.
D) flexion of the vertebral column.
E) abduction of the hip.