Axial Muscles Cheat Sheet

These flashcards cover key information regarding the axial muscles, their origins, insertions, and actions.

What is the origin of the External Oblique muscle?

Lower 8 ribs

Where does the Internal Oblique muscle insert?

Linea alba, ribs 10-12

What is the action of the Transversus Abdominis?

Compress abdomen

What is the insertion point of the Rectus Abdominis?

Xiphoid, ribs 5-7

What is the origin of the Psoas Major muscle?

T12-L5 vertebrae

What action does the Iliacus muscle perform?

Flex hip

Where does the Quadratus Lumborum insert?

12th rib, L1-L4

What is the function of the External Intercostals?

Elevate ribs

What muscle depresses the ribs?

Internal Intercostals

Where does the Subcostales muscle originate?

Inner rib

What is the insertion of the Transversus Thoracis?

Costal cart. 2-6

What structure does the Diaphragm contribute to?

Inspiration

What is the origin of the Scalenes?

C3-C7

What action do the Levatores Costarum perform?

Elevate ribs

What is the origin of the Trapezius muscle?

Occipital, C7-T12

Where does the Latissimus Dorsi muscle insert?

Humerus groove

What action does the Levator Scapulae perform?

Elevate scapula

What is the origin of the Rhomboid Major/Minor?

C7-T5

What is the action of Serratus Post. Sup.?

Elevate ribs

What muscle depresses ribs 9-12?

Serratus Post. Inf.

What is the function of Erector Spinae (ILS)?

Extend spine

What is the origin of the Transversospinalis muscle?

Transverse processes

What action does the Levator Ani support?

Support pelvic floor

What is the action of the Quadratus Lumborum?

Lateral flexion

Where does the Diaphragm insert?

Central tendon

Which muscle originates from the iliac crest and sacrum?

Erector Spinae (ILS)

What do the External Intercostals do to the ribs?

Elevate ribs

What is the insertion of the Internal Oblique muscle?

Linea alba, ribs 10-12

What muscle originates from ribs 2-5?

Serratus Post. Sup.

Where does the Rectus Abdominis originate?

Pubic symphysis

What is the primary action of the Psoas Major?

Flex hip

What muscle is located at the lower part of the abdominal wall?

Transversus Abdominis

What is the action performed by the Serratus Post. Inf.?

Depress ribs

What structure does the Levator Scapulae attach to?

Scapula (superior)

What muscle group does the Erector Spinae belong to?

Deep Back Muscles

What muscle is responsible for compressing the abdomen?

Transversus Abdominis

What is the origin of the External Oblique muscle?

Lower 8 ribs

What muscle originates from the C1-C4 vertebrae?

Levator Scapulae

Which muscles retract the scapula and originate from C7-T5?

Rhomboid Major/Minor

What are the origins of the Trapezius muscle?

Occipital, C7-T12

Where does the Iliacus muscle insert?

Lesser trochanter

What is the action of the Transversus Thoracis muscle?

Depress ribs

What is the primary role of the Diaphragm?

Inspiration

Where does the Quadratus Lumborum muscle insert?

12th rib, L1-L4

What is the action performed by the Levator Ani?

Support pelvic floor

What muscle elevates the first and second ribs?

Scalenes

What muscle group includes Serratus Post. Sup. and Serratus Post. Inf.?

Intermediate Back Muscles

What is the primary function of the Internal Intercostals muscle?

Depress ribs

What muscle group consists of the Psoas Major and Iliacus?

Hip Flexors

What movement does the Latissimus Dorsi assist in?

Extend/adduct arm

What is the function of the Erector Spinae?

Extend spine