KPER 2320 Review (Lab 1: Anatomical Terms, Planes and Movements, Thorax and Abdomen) (copy)

Muscle Actions, Nerves, Insertions and Origins.

Serratus Posterior Inferior

• Proximal

• Distal

• Nerve

• Action

1.

Serratus Posterior Inferior (Proximal)

Inferior borders of 8 - 12th ribs near their angles.

Serratus Posterior Inferior (Distal)

Spinous processes of T11 - L2 vertebrae.

Serratus Posterior Inferior (Nerve:)

9th to 11th Intercostal nerves, T12 nerve

Serratus Posterior Inferior (Action:)

Depresses ribs.

Serratus Posterior Superior

• Proximal

• Distal

• Nerve

• Action

2.

Serratus Posterior Superior (Proximal)

Nuchal ligament, spinous processes of C7 - T3 vertebrae

Serratus Posterior Superior (Distal)

Superior borders of 2nd - 4th ribs

Serratus Posterior Superior (Nerve:)

2nd and 5th Intercostal nerves

Serratus Posterior Superior (Action:)

Elevates ribs.

Intercostals

• Proximal

• Distal

• Nerve

• Action

3.

Intercostals (Proximal:)

Inferior border of ribs

Intercostals (Distal)

Superior border of ribs below

Intercostals (Nerve)

Intercostal

Intercostals (Action)

Inspire (elevation) of ribs, expiration (depression) of ribs, interchondral part elevates ribs

What are the Proximal and Distal Attachments of the External Oblique, and what nerves and actions does it cause?

Proxial: External surfaces of 5th to 12th ribs

Distal: Linea alba, pubic tubercle and anterior half of iliac crest

Nerve: Thoraco abdominal subcostal nerves

Action: Compress and support abdominal viscera

Internal Oblique

• Proximal

• Distal

• Nerve

• Action

4.

Internal Oblique (Proximal)

Thoracolumbar fascia, anterior 2/3’s of iliac crest and CT deep to inguinal ligament.

Internal Oblique (Distal)

Inferior borders of 10th - 13th ribs, linea alba, and pubis via conjoint tendon.

Internal Oblique (Nerve)

Thoraco - abdominal nerves, subcostal and first lumbar nerve

Internal Oblique (Action:)

Compresses and supports abdominal viscera flexes and rotates trunk.

Rectus Abdominis

• Proximal

• Distal

• Nerves

• Action

5.

Rectus Abdominis (Proximal)

Pubic symphisis and pubic crest

Rectus Abdominis (Distal)

Xipohoid process and 5th - 8th costal cartilages

Rectus Abdominis (Nerves)

Thoraco abdominal and subcostal nerves

Rectus Abdominis (Action:)

Flexes trunk (lumbar vertebrae) and compresses abdominal viscera stabilizing and controlling the tilt of the pelvis.

Iliacus

• Proximal

• Distal

• Nerve

• Action

6.

Iliacus (Proximal)

Superior 2/3’s of iliac fossa, ala of sacrum and anterior sacro iliac ligaments.

Iliacus (Distal)

Lesser trochanter of femur and shaft interior to it and to Psoas Major tendon

Iliacus (Nerve)

Femoral Nerve

Iliacus (Action:)

Flexes thigh and stabilizes hip joint, acts with Psoas major

Transversus Abdominis

• Proximal

• Distal

• Nerves

• Action

7.

Transversus Abdominis (Proximal)

Internal surfaces of 7th to 12th costal cartilages, thoracolumbar fascia, iliac crest, CT deep to inguinal ligament

Transversus Abdominis (Distal)

Linea Alba with aponeurosis of internal oblique, pubic crest and pubis via conjoint tendon.

Transversus Abdominis (Nerves)

Thoraco abdominal, subcostal and first lumbar nerve

Transversus Abdominis (Action:)

Compresses and supports abdominal viscera

Psoas Major

• Proximal

• Distal

• Nerves

• Action

8.

Psoas Major (Proximal)

Transverse processes of lumbar vertebrae; sides of bodies of T12 - S1 vertebrae and intervening IV discs.

Psoas Major (Distal)

Strong tendon to lesser trochanter of femur

Psoas Major (Nerves:)

Lumbar plexus via anterior branches of nerves L2 - L4, lumbar nerves

Psoas Major (Action:)

Acts inferiorly to iliacus, flexes thigh, acts superiorly flexing vertebral column to balance trunk; when sitting, acts inferiorly with iliacus to flex trunk

Quadratus Lumborum

• Proximal

• Distal

• Nerves

• Action

9.

Quadratus Lumborum (Proximal)

Medial half of inferior border of 12th rib and tips of lumbar transverse processes

Quadratus Lumborum (Distal:)

Iliolumbar ligament and internal lip of iliac crest

Quadratus Lumborum (Nerves:)

Anterior branches of Thoracic and Lumbar nerves

Quadratus Lumborum (Action:)

Extends and laterally flexes vertebral column, fixes 12th rib during inspiration.