Action and Origins Flashcards

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Name: Diaphragm
Origin: Ribs, Zyphoid process
Insertion: Fibers meet on central tendon
Action: Inspiration

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

Name: External Intercostals
Origin: Rib
Insertion: Inferior rib
Action: Elevate rib (inspiration)