Around the Tummy
Around the Ribs
Around the Ribs cont.
Back&Pecs
Back cont.
100
Rectus Abdominus: O:___ I:_____ A:____ In:__
What is: Rectus Abdominus: O: Pubic symphysis I: Xiphoid process, Costal cartilages 5-7 A: Compresses abdomen, flexes trunk (vertebral column) "sit-up" Divided into segments by three transverse tendinous intersections, "six-pack" appearance In: Anterior primary rami (T7-12)
100
Internal Intercostals: O:___ I:____ A:____ In:___
What is: Internal Intercostals: O: Ribs 2-12 I: Inferior margin of next higher rib A: Depresses ribs during forced exhalation; thoracic cavity is compressed and air is expelled only used during forced exhalation In: Muscular collateral branches of intercostal nerves
100
Spinalis: O: I: A: In:
What is: Spinalis: O: Ribs 3 – 12, thoracic and Lumbar vertebrae I: Mastoid process, Cervical and Thoracic vertebrae, All ribs A: Extension and Lateral Flexion of vertebral column; longissimus capitis also produces ipsilateral rotation of the head In: Posterior primary rami
100
Latissimus dorsi: O: I: A:
What is: Origin: spinous process of T7-L5 upper 2-3 sacral segments iliac crest lower 3 or 4 Ribs Insertion: lateral lip of the intertubercular groove Action: adduction of humerus medial rotation of the humerus extension from flexed position downward rotation of the scapula In: thoracodorsal nerve, C6,7,8
100
Rhomboid minor: O: I: A: In:
What is: Origin: spinous process of C7 & T1 ligamentum nuchae supraspinous ligament Insertion: medial margin of the scapula at the medial angle Action: retract scapula Nerve: dorsal scapular nerve, C5, [C4]
200
External Oblique: O:____ I:_____ A:____ In:___
What is: External Oblique: O: Ribs 5-12 I: Iliac crest, pubic symphysis A: The external oblique functions to pull check downward compress the abdominal cavity flexion and rotation of vertebral column In: Anterior primary rami (T7-12)
200
Diaphram: O:___ I:____ A:____ In:___
What is: Diaphram: O: Xiphoid process, lumbar vertebrae, ribs and costal cartilages 7 – 12 I: Central tendon of diaphragm Increases size of thoracic cavity for inhalation; prime mover for inspiration; responsible for about 2/3 of air intake) Contracts in preparation for sneezing, coughing crying, laughing, weight lifting In: Phrenic nerve (motor) (C3, 4, 5). Sensory: phrenic, intercostals (6-12) and upper two lumbar nerve roots
200
Semispinalis thoracis: O: I: A: In:
What is: Semispinalis thoracis: O: Vertebrae T6 – T10 I: Vertebrae C6 – T4 A: Extension and contralateral rotation of the vertebral column In: Dorsal rami of upper thoracic spinal nerves
200
Subclavius: O: I: A: In:
What is: Subclavius Origin: first rib about the junction of bone and cartilage Insertion: lower surface of clavicle Action: assists in stabilizing the clavicle Nerve: nerve to the subclavius, C5,6
200
Rhomboid major: O: I: A: In:
What is: Rhomboid major: Origin: spinous processes of T2-T5 supraspinous ligament Insertion: medial scapula from the scapular spine to the inferior angle Action: retract scapula Nerve: dorsal scapular nerve, C5
300
Internal Oblique: O:_____ I:______ A:______ In:__
What is: O: Iliac Crest, Inguinal ligament I: Ribs 10-12, costal cartilages, 7-10, pubis A: antagonist to diaphram (helps reduce volume of thoracic cavity during exhalation) rotation and abduction of trunk In: Anterior primary rami (T7-12) (conjoint tendon ilioinguinal nerve (L1))
300
Erector Spinae: O:____ I:_____ A:_____ In:____
What is: Erector Spinae: O: Ribs 3 – 12, thoracic and Lumbar vertebrae I: Mastoid process, Cervical and Thoracic vertebrae, All ribs A: Extension and Lateral Flexion of vertebral column; longissimus capitis also produces ipsilateral rotation of the head In: Posterior primary rami
300
Quadratus Lumborum: O: I: A: In:
What is: Quadratus Lumborum O: Iliac Crest I: Rib 12 and vertebrae L1 – L4 A: Aids in respiration by fixing rib 12; unilateral contraction causes ipsilateral flexion of lumbar vertebral column; bilateral contraction extends lumbar vertebral column In:Anterior primary rami (T12-L3)
300
Pectoralis major: O: I: A: In:
What is: Pectoralis major Origin: medial 1/3 of clavicle anterior aspect of manubrium & length of body of sternum cartilaginous attachments of upper 6 ribs external oblique's aponeurosis Insertion: lateral lip of bicipital groove to the crest of the greater tubercle clavicular fibers insert more distally; sternal fibers more proximally Action: adducts humerus medially rotates humerus flexion of the arm from extension (clavicular portion) In: medial and lateral pectoral nerve
300
Serratus anterior: O: I: A: In:
What is: Origin: fleshy slips from the outer surface of upper 8 or 9 ribs Insertion: costal aspect of medial margin of the scapula Action: protract scapula stabilize scapula assists in upward rotation Nerve: long thoracic nerve, C5,6,7
400
Transverse abdominus: O:__ I:__ A:__ In:__
What is: Transverse abdominus: O: Inguinal ligament, iliac crest, costal cartilages 7-12 I: linea alba A: compress abdomen, rotate trunk laterally In: Anterior primary rami (T7-12). Conjoint tendon ilioinguinal nerve (L1)
400
Iliocostalis: O: I: A: In:
What is: O: Ribs 3 – 12, thoracic and Lumbar vertebrae I: Mastoid process, Cervical and Thoracic vertebrae, All ribs A: Extension and Lateral Flexion of vertebral column; longissimus capitis also produces ipsilateral rotation of the head In: Posterior primary rami
400
Multifidus: O: I: A: In:
What is: Multifidus: O: Vertebrae C4 – L5, sacrum I: Spinous processes of vertebrae A: Stabilization of adjacent vertebrae, maintenance of posture In: dorsal rami of the cervical spinal nerves
400
Pectoralis minor: O: I: A: In:
What is: Pectoralis minor Origin: outer surface of ribs 2-5 or 3-5 or 6 Insertion: medial aspect of coracoid process of the scapula Action: depresses & downwardly rotates the scapula assists in scapular protraction from a retracted position stabilizes the scapula Nerve: medial pectoral nerve, C8,T1
400
Supraspinatus: O: I: A: In:
What is: Origin: supraspinous fossa muscle fascia Insertion: uppermost of three facets of the greater tubercle of humerus Action: abduction of arm (first 15-20°) stabilizes glenohumeral joint Nerve: suprascapular nerve, C5,6
500
External Intercostals: O:__ I:___ A:__ In:___
What is: O: Ribs 1-11 I: Superior margin of next lower rib A: elevates ribs and moves them anteriorly, increases size of thoracic cavity inhalation In: Muscular collateral branches of intercostal nerves
500
Longissimus: O: I: A: In:
What is: Longissimus: O: Ribs 3 – 12, thoracic and Lumbar vertebrae I: Mastoid process, Cervical and Thoracic vertebrae, All ribs A: Extension and Lateral Flexion of vertebral column; longissimus capitis also produces ipsilateral rotation of the head In: Posterior primary rami
500
Trapezius: O: I: A: In:
What is: Trapezius: Origin: external occipital protuberance along the medial sides of the superior nuchal line ligamentum nuchae (surrounding the cervical spinous processes) spinous processes of C1-T12 Insertion: posterior, lateral 1/3 of clavicle acromion superior spine of scapula Action: elevates scapula upward rotation of the scapula (upper fibers) downward rotation of the scapula (lower fibers) retracts scapula Nerve: spinal Accessory (XI) (efferent or motor fibers) ventral ramii of C3 & C4 (afferent or sensory fibers)
500
Levator scapulae: O: I: A: In:
What is: Levator scapulae Origin: transverse processes of C1-C3 or C4 Insertion: superior angle of scapula toward the scapular spine Action: elevates the scapula extends and/or laterally flexes the head Nerve: nerves off cervical plexus, C3,4 dorsal scapular nerve, C5
500
Infraspinatus: O: I: A: In:
What is: Origin: infraspinous fossa muscle fascia Insertion: middle facet of greater tubercle of humerus Action: external rotation of the humerus stabilizes the glenohumeral joint Nerve: suprascapular nerve, C5,6
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