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Anterior Torso
Muscles of the Anterior Torso
| Question | Answer |
|---|---|
| What is the Origin of the Scalenes | Trans processes of C3-C7 |
| What is the Origin of the Sternocleidomastoid | Superior aspect of the manubrium & medial third of clavicle |
| What is the Origin of the Pectoralis Major | Medial half of clavicle, sternum and costal cartilage of ribs 1-6 |
| What is the Origin of the Pectoralis Minor | Ribs 3,4 & 5 |
| What is the Origin of the Subclavius | First rib |
| What is the Origin of the Serratus Anterior | Anterior surfaces of the first upper 8 or 9 ribs |
| What is the Origin of the Rectus Abdominus | Pubic crest and the Pubic Symphysis |
| What is the Origin of the Internal Obliques | Lateral inguinal ligament, Iliac crest and the thoracolumbar fascia |
| What is the Origin of the External Obliques | The lower 8 Ribs |
| What is the Origin of the Transverse Abdominals | Lateral Inguinal Ligament, Iliac crest, Thoracolumbar fascia and internal surface of the lower 6 ribs |
| What is the Origin of the Diaphragm | Inner surface of the lower 6 ribs, upper 2 or 3 lumbar vertebrae, inner part of xiphoid process |
| What is the Insertion of the Scalenes | First and second ribs |
| What is the Insertion of the Sternocleidomastoid | Mastoid process |
| What is the Insertion of the Pectoralis Major | Crest of greater tubercle of humerus |
| What is the Insertion of the Pectoralis Minor | Coracoid Process of Scapula |
| What is the Insertion of the Subclavius | Inferior lateral aspect of clavicle |
| What is the Insertion of the Serratus Anterior | Anterior surface of medial border of scapula |
| What is the Insertion of the Rectus Abdominus | The Costal Cartilage of ribs 5,6 & 7 and xiphoid process |
| What is the Insertion of the Internal Obliques | Internal surface of lower 3 ribs, abdominal aponeurosis to linea alba |
| What is the Insertion of the External Obliques | Anterior part of iliac crest, abdominal aponeurosis to linea alba |
| What is the Insertion of the Transverse Abdominals | Abdominal aponeurosis to linea alba. |
| What is the Insertion of the Diaphragm | Central tendon |
| What are the actions of the Scalenes | *Lat flex head and neck to same side *Rotate head and neck to opposite side (weak) *Elevate ribs during inhalation *Flex head and neck (ant. only) |
| What are the actions of the Sternocleidomastoid | *Lat flex head and neck to same side *Rotate head & neck to opposite side *Bilaterally flex neck |
| What are the actions of the Pectoralis Major | ALL – adduct & medially rotate the humerus UPPER – flex and horizontally adduct the humerus LOWER – extend the humerus |
| What are the actions of the Pectoralis Minor | *Depress and abduct scapula. *Tilt scapula anteriorly *raises ribs during inspiration |
| What are the actions of the Subclavius | *Draw clavicle inferiorly and anteriorly. *Elevate first rib (to assist inhalation) *Stabilize sternoclavicular joint |
| What are the actions of the Serratus Anterior | FIXED ORIGIN=abduct and depress scapula & hold medial border of scapula against rib cage FIXED SCAPULA=may act in forced inhalation |
| What are the actions of the Rectus Abdominus | Flex vertebral column (lumbar spine) |
| What are the actions of the Internal Obliques | UNILATERAL=laterally flex vertebral column to same side. Rotate spine to same side BILATERAL=Flex spine and compress abdominal contents |
| What are the actions of the External Obliques | UNILATERAL=Lat flex spine to same side. Rotate spine to opposite side. BILATERAL=flex spine |
| What are the actions of the Transverse Abdominals | Compress abdominal contents & stabilise trunk |
| What are the actions of the Diaphragm | Draw down the central tendon of diaphragm. Increase volume of thoracic cavity during inhalation |
| What muscle originates from the Trans processes of C3-C7 | Scalenes |
| What muscle originates from the Superior aspect of the manubrium & medial third of clavicle | Sternocleidomastoid |
| What muscle originates from the Medial half of clavicle, sternum and costal cartilage of ribs 1-6 | Pectoralis Major |
| What muscle originates from the Ribs 3,4 & 5 | Pectoralis Minor |
| What muscle originates from the First rib | Subclavius |
| What muscle originates from the Anterior surfaces of the first upper 8 or 9 ribs | Serratus Anterior |
| What muscle originates from the Pubic crest and the Pubic Symphysis | Rectus Abdominis |
| What muscle originates from the Lateral inguinal ligament, Iliac crest and the thoracolumbar fascia | Internal Obliques |
| What muscle originates from the The lower 8 Ribs | External Obliques |
| What muscle originates from the Lateral Inguinal Ligament, Iliac crest, Thoracolumbar fascia and internal surface of the lower 6 ribs | Transverse Abdominals |
| What muscle originates from the Inner surface of the lower 6 ribs, upper 2 or 3 lumbar vertebrae, inner part of xiphoid process | Diaphragm |
| What muscle Inserts into the First and second ribs | Scalenes |
| What muscle Inserts into the Mastoid process | Sternocleidomastoid |
| What muscle Inserts into the Crest of greater tubercle of humerus | Pectoralis Major |
| What muscle Inserts into the Coracoid Process of Scapula | Pectoralis Minor |
| What muscle Inserts into the Inferior lateral aspect of clavicle | Subclavius |
| What muscle Inserts into the Anterior surface of medial border of scapula | Serratus Anterior |
| What muscle Inserts into the Costal Cartilage of ribs 5,6 & 7 and xiphoid process | Rectus Abdominis |
| What muscle Inserts into the Internal surface of lower 3 ribs, abdominal aponeurosis to linea alba | Internal Obliques |
| What muscle Inserts into the Anterior part of iliac crest, abdominal aponeurosis to linea alba | External Obliques |
| What muscle Inserts into the Abdominal aponeurosis to linea alba. | Transverse Abdominals |
| What muscle Inserts into the Central tendon | Diaphragm |
| What muscles Actions are to: *Lat flex head and neck to same side *Rotate head and neck to opposite side (weak) *Elevate ribs during inhalation *Flex head and neck (ant. only) | Scalenes |
| What muscles Actions are to: *Lat flex head and neck to same side *Rotate head & neck to opposite side *Bilaterally flex neck | Sternocleidomastoid |
| What muscles Actions are to: ALL – adduct & medially rotate the humerus UPPER – flex and horizontally adduct the humerus LOWER – extend the humerus | Pectoralis Major |
| What muscles Actions are to: *Depress and abduct scapula. *Tilt scapula anteriorly *raises ribs during inspiration | Pectoralis Minor |
| What muscles Actions are to: *Draw clavicle inferiorly and anteriorly. *Elevate first rib (to assist inhalation) *Stabilize sternoclavicular joint | Subclavius |
| What muscles Actions are to: FIXED ORIGIN=abduct and depress scapula & hold medial border of scapula against rib cage FIXED SCAPULA=may act in forced inhalation | Serratus Anterior |
| What muscles Actions are to: Flex vertebral column (lumbar spine) | Rectus Abdominis |
| What muscles Actions are to: UNILATERAL=laterally flex vertebral column to same side. Rotate spine to same side BILATERAL=Flex spine and compress abdominal contents | Internal Obliques |
| What muscles Actions are to: UNILATERAL=Lat flex spine to same side. Rotate spine to opposite side. BILATERAL=flex spine | External Obliques |
| What muscles Actions are to: Compress abdominal contents & stabilise trunk | Transverse Abdominals |
| What muscles Actions are to: Draw down the central tendon of diaphragm. Increase volume of thoracic cavity during inhalation | Diaphragm |
Created by:
Arran105
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