Muscle groups and what they do

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What is the origin of the subscapularis-rotator cuff?

supraspinous fossa
What is the insertion of the subscapularis?

Humerus
What is the action of the subscapularis?
- Abduction at the shoulder
- Medial rotation at shoulder
What is the orgin of the supraspinatus muscle?

Supraspinous fossa
Where is the insertion of the supraspinous muscle?
- Humerus
- Greater tubercle
What is the action ofthe supraspinous muscle?

Abduction at the shoulder
What is the origin of the infraspinatus muscle?

Medially to the infraspinous fossa of the scapula
Where is the insertion of the infraspinatus muscle?

Humerus
What is the action of the infraspinatus muscle?

Lateral rotation at the shoulder
What is the origin of the teres minor?

Scapula
Where is the insertion of the teres minor?

Humerus
What is the action of the teres minor?

Lateral rotation at the shoulder
What muscles make up the rotator cuff?
- Subscapularis
- Supraspinatus
- Infraspinatus
- Teres minor
Which muscles make up the oblique & rectus?
- Diaphragm
- Rectus abdominis
- External obliques
- Internal obliques
- Transverse abdominis
What is the action of the diaphragm?

Contraction expands thoracic cavity
Where is the origin of the rectus abdominis?

Superior surface of pubis around symphysis
What is the insertion of the rectus abdominis?

Inferior surface of cartilages (ribs 5-7) & xipoid process
What is the action of the rectus abdominis?

Depresses ribs, compresses abdomen, flexs vertebrae column
Where is the origin of the external oblique?

Lower 8 costae
What is the insertion of the external oblique?

Illiac crest
What is the action of the external oblique?

Compresses abdomen
Where is the origin of the internal obliques?

Illiac crest
What is the insertion of the internal oblique?

Xiphoid process
What is the action of the internal oblique?
- Compresses abdomen
- Rotates vertebral column
What is the action of the transverse abdominis?

Compresses abdomen
What muscles make up the quadriceps?
- Rectus femoris
- Vastus lateralis
- Vastus medialis
- Vastus intermedius
Where is the origin of the rectus femoris?

Inferior illiac spine
What is the insertion of the rectus femoris?

Patellar tendon
What is the action of the rectus femoris?
- Extension at knee
- Crosses hip & knee joint
Where is the origin of the vastus lateralis?

Femur
What is the insertion of the vastus lateralis?

Patella
What is the action of the vastus lateralis?

Extension at knee
What is the action of the vastus medialis?

Extension of knee
What is the action of the vastus intermedius?
- Extension of knee
- (knee reflex)
What muscles make up the hamstrings?
- Biceps femoris
- Semitendinosus
- Semimembranosus
Where is the origin of the biceps femoris?

Tuberosity of ischium
What is the insertion of the biceps femoris?

Head of fibula
What is the action of the biceps femoris?
- Flexion at the knee
- Laterally rotates knee

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12olokun28

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Muscle groups and what they do

Description

rotator cuff, etc...

Updated

2010-10-10T05:42:51Z

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