anatomy

Question 1

rectus abdominis

Answer 1

O: Pubis
I: Xiphoid process, Costal Cartilage of 5,6,7th ribs
A: trunk flexion; compress abdomen
N: 7-12 intercostal nerve

Question 2

external oblique

Answer 2

O: lower 8 ribs laterally
I: Iliac crest & linea alba
A: (B) trunk flexion; compress abdomen
A: (U) Sidebend; rotation to opp side
N: 8-12 intercostal, iliohypogastric, ilioinguinal

Question 3

Internal oblique

Answer 3

O: inguinal ligament, iliac crest, thorocolumbar fascia
I: 10-12 ribs; abdominal aponeurosis
A: (B) trunk flexion; compress abdomen
A: (U) Sidebend; rotation to same side
N: 8-12 intercostal, iliohypogastric;ilioinguinal nerves

Question 4

transverse abdominis

Answer 4

O: inguinal ligament, iliac crest, thorocolumbar fascia, 6-12th ribs
I: abdominal aponeurosis & linea alba
A: Compression of abdomen
N: 7-12th intercostal, iliohypogastric, ilioinguinal nerves

Question 5

erector spinae

Answer 5

Spinalis, longissimus, iliocostalis
(B) extend the trunk
(U) Sidebend trunk

Question 6

Transversospinalis (transverse spinals)

Answer 6

O: TP
I: SP of vertebra above
A: (B) extend, (U): rotate to opp side
N: spinal

Question 7

Interspinales

Answer 7

O: SP below
I: SP above
A: extension
N: Spinal

Question 8

Intertransversarii

Answer 8

O: TP below
I: TP above
A: Sidebend
N: spinal

Question 9

Quadratus Lumborum

Answer 9

O: Iliac crest
I: 12th rib, TP L1-L5
A: side bend

Question 10

Three Transversospinalis Muscles

Answer 10

Semispinalis: span 5+ verts
Multifidis: 2-4 verts
rotatores: only one vert