Anatomy: Abdominal Muscles

Question 1

External Oblique Origin

Answer 1

External Surface of Lower 8 Ribs

Question 2

External Oblique Insertion

Answer 2

Anterior Iliac Crest and Abdominal Aponeurosis

Question 3

External Oblique Action

Answer 3

• Flex Trunk
• Contralateral Rotation

Question 4

External Oblique Characteristics

Answer 4

• Non Ropy
• Superficial

Question 5

Internal Oblique Origin

Answer 5

• Lateral Inguinal Ligament
• Iliac Crest
• Thoracolumbar Aponeurosis

Question 6

Internal Oblique Insertion

Answer 6

• Cartilage of Lower 3 Ribs
• Abdominal Aponeurosis to Linea Alba

Question 7

Internal Oblique Action

Answer 7

• Flex Trunk
• Compress Abdominal Contents
• Ipsilateral Lateral Flexion and Rotation of the Trunk

Question 8

Internal Oblique Characteristics

Answer 8

• Non Ropy
• Deep

Question 9

Transverse Abdominis Origin

Answer 9

• Lateral Inguinal Ligament
• Iliac Crest
• Thoracolumbar Aponeurosis
• Cartilage of Lower 6 Ribs

Question 10

Transverse Abdominis Insertion

Answer 10

• Abdominal Aponeurosis to Linea Alba

Question 11

Transverse Abdominis Action

Answer 11

• Compress Abdominal Contents

Question 12

Transverse Abdominis Characteristics

Answer 12

• Non Ropy
• Deep

Question 13

Diaphragm Origin

Answer 13

• Inner Surface of Lower 6 Ribs
• Upper 2 to 3 Lumber Vertebrae
• Inner Part of Xiphoid Process

Question 14

Diaphragm Insertion

Answer 14

• Central Tendon

Question 15

Diaphragm Action

Answer 15

• Draws down the central tendon during inspiration and increases the volume of the thoracic cage

Question 16

Diaphragm Characteristics

Answer 16

• Non Ropy
• Deep

Question 17

Temporalis Origin

Answer 17

Temporal Fossa and Fascia

Question 18

Temporalis Insertion

Answer 18

Coronoid Process of the Mandible

Question 19

Temporalis Actions

Answer 19

• Elevate Mandible
• Retract Mandible

Question 20

Temporalis Characteristcs

Answer 20

• Non Ropy
• Superficial

Question 21

Masseter Origin

Answer 21

Zygomatic Arch

Question 22

Masseter Insertion

Answer 22

Angle and Ramus of Mandible

Question 23

Masseter Action

Answer 23

• Elevates Mandible
• Protract Mandible

Question 24

Masseter Characteristics

Answer 24

• Non Ropy
• Superficial and Deep

Question 25

Medial Pterygoid Origin

Answer 25

- Medial Surface of Lateral Pterygoid Plate of the Sphenoid Bone - Tuberosity of Maxilla

Question 26

Medial Pterygoid Insertion

Answer 26

Inner Surface of Ramus of the Mandible

Question 27

Medial Pterygoid Action

Answer 27

- Elevates Mandible - Protracts Mandible - Moves Mandible Side to Side

Question 28

Medial Pterygoid Characteristics

Answer 28

- Non Ropy - Deep

Question 29

Lateral Pterygoid Origin

Answer 29

Sphenoid Bone

Question 30

Lateral Pterygoid Inserion

Answer 30

- Articular Disc and Capsule of TMJ - Neck of Mandible

Question 31

Lateral Pterygoid Action

Answer 31

- Depresses Mandible - Moves Mandible Side to Side