Action and Origins

Question 1

Answer 1

Name: Splenius Capitis

Origin: Spinus process of C7 - T4
Insertion: Occipital bone and mastoid process
Action: One sided: Same side lateral flexion and rotation
Both: Extension of the head and neck

Question 2

Answer 2

Name: Splenius cervicis

Origin: Spinus process of T3-T6
Insertion: Spinus process of C1-C3
Action: One Sided: Same side lateral flexion and rotation
Both: Extension of neck

Question 3

Answer 3

Name: Scalenus Posterior

Origin: Transverse process of C5-C7
Insertion: Second rib
Action: Primary: Elevates second rib
One sided: Same side lateral flexion and rotation
Both: Flexion of neck

Question 4

Answer 4

Name: Scalenus Medius

Origin: Transverse process C2-C7
Insertion: First rib
Action: Primary: Upper movement of first rib
One Sided: Same side lateral flexion and rotation
Both: Flexion of neck

Question 5

Answer 5

Name: Scalenus Anterior

Origin: Transverse process T3-T6
Insertion: First rib
Action: Primary: Upper movement of first rib
One Sided: Same side lateral flexion and rotation
Both: Flexion of neck

Question 6

Answer 6

Name: Sternocleidomastoid

Origin: Sternum and clavicle
Insertion: Mastoid
Action: One Sided: Same side lateral flexion and opposite side rotation
Both: Neck and head extension

Question 7

Answer 7

Name: Masseter

Origin: Zygomatic bone and arch
Insertion: Mandible
Action: Closes the jaw

Question 8

Answer 8

Name: Spinalis

Origin: Spinous process
Insertion: Superior spinous process
Action: One Sided: Same side lateral flexion and rotation
Both: Trunk extension

Question 9

Answer 9

Name: Longissimus

Insertion: Superior transverse process
Action: One sided: Same side lateral flexion and rotation
Both: Trunk extension

Question 10

Answer 10

Name: Iliocostalis

Origin: Sacrum, illium, ribs
Insertion: Ribs and transverse process at C4-C7
Action: One sided: Same side lateral flexion and rotation
Both: Trunk extension

Question 11

Answer 11

Name: Rectus Abdominusus

Origin: Pubic crest and pubic symphysis
Insertion: Ribs 5-7 and xiphoid process
Action: Compression of abdominal wall, trunk flexion, weak lateral flexion

Question 12

Answer 12

Name: External Obliques

Origin: Lower 8 ribs
Insertion: Iliac crest and aponeurosis
Action: One sided: Same side lateral flexion and opposite side rotation
Both: Compression of abdominal wall and trunk flexion

Question 13

Answer 13

Name: Internal Obliques

Origin: Iliac crest and inferior lumbar aponeurosis
Insertion: Ribs 9-12
Action: One sided: Same side lateral flexion and opposite side rotation
Both: Compression of abdominal wall and trunk flexion

Question 14

Answer 14

Name: Transverse Abdominus

Origin: Iliac and bottom six ribs
Insertion: pubic crest and aponeurosis of iliac alba
Action: Compression of abdominal wall

Question 15

Answer 15

Name: Diaphragm

Origin: Ribs, Zyphoid process

Insertion: Fibers meet on central tendon
Action: Inspiration

Question 16

Answer 16

Name: Internal Intercostals

Origin: Rib, costal cartilage
Insertion: Inferior rib, costal cartilage
Action: Forced expiration

Question 17

Answer 17

Name: External Intercostals

Origin: Rib
Insertion: Inferior rib
Action: Elevate rib (inspiration)