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Anatomy Exam 1 - Thoracic Limb
Origins, insertions, nerve, action, groups
74
Anatomy
Professional
09/21/2011

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Term
Extrinsic Thoracic Limb Muscles, dorsal (2)
Definition
  1. Trapezius
  2. Rhomboideus
Term
Extrinsic Thoracic Limb Muscles, Ventral (3)
Definition
  1. Serratus ventralis
  2. Superficial pectoral
  3. Deep pectoral
Term
Extrinsic Thoracic Limb Muscles, Cranial group (2)
Definition
  1. Omotransversarius
  2. Brachiocephalicus
Term
Extrinsic Thoracic Limb Muscles, Caudal (1)
Definition
  1. Latissmus dorsi
Term
Intrinsic muscles, shoulder, lateral (4)
Definition
  1. Deltoid
  2. Teres minor
  3. Supraspinatus
  4. Infraspinatus
Term
Intrinsic muscles, shoulder, medial (3)
Definition
  1. Subscapularis
  2. Teres major
  3. Coracobrachialis
Term
Intrinsic muscles, brachial, caudal (2)
Definition
  1. Triceps brachii
  2. Anconenus
Term
Intrinsic muscles, brachial, cranial (2)
Definition
  1. Biceps brachii
  2. Brachialis
Term
Intrinsic muscles, antebrachial, craniolateral (7)
Definition
  1. Brachioradialis (Fe)
  2. Extensor carpi radialis
  3. Common digital extensor
  4. Lateral digital extensor
  5. Ulnaris lateralis (extensor carpi ulnaris)
  6. Abductor digit I longus
  7. Supinator
Term
Intrinsic muslces, antebrachial, caudomedial (7)
Definition
  1. Pronator teres
  2. Flexor carpi radialis
  3. Superficial digital flexor
  4. Flexor carpi ulnaris
  5. Deep digital flexor
  6. Pronator quadratus
  7. Interosseus muscles
Term
Action: elevate & abduct forelimb (2)
Definition
  1. Trapezius
  2. Rhomboideus
Term
Action: draw limb caudally (2)
Definition
  1. Latissmus dorsi
  2. Deep pectoral
Term
Action: Support trunk (1)
Definition
  1. Serratus ventralis
Term
Action: Adduct forelimb (1)
Definition
  1. Superficial pectoral
Term
Action: Advance limb (2)
Definition
  1. Deep pectoral (when limb fixed)
  2. Cleidobrachialis
Term
Action: Fix neck (2)
Definition
  1. Cleidodephalicus (mastoid head)
  2. Cleidocephalicus (cervical head), fixes bilaterally
Term
Aection: flex shoulder (6)
Definition
  1. Deltoideus
  2. Teres minor
  3. Infraspinatus
  4. Teres major
  5. Triceps brachii (long head)
  6. Biceps brachii
Term
Action: extend shoulder (5)
Definition
  1. Deep pectoral
  2. Supraspinatus
  3. Infraspinatus
  4. Subscapularis
  5. Coracobrachialis
Term
Action: stabilize shoulder (3)
Definition
  1. Supraspinatus
  2. Infraspinatus
  3. Subscapularis
Term
Action: adduct shoulder (2)
Definition
  1. Subscapularis
  2. Coracobrachialis
Term
Action: rotate shoulder inward (1)
Definition
  1. Teres major
Term
Action: rotate shoulder outward (1)
Definition
  1. Teres minor
Term
Action: flex elbow (2)
Definition
  1. Biceps brachii
  2. Brachialis
Term
Action: extend elbow (2)
Definition
  1. Triceps brachii
  2. Anconeus
Term
Action: flex carpus (5)
Definition
  1. Ulnaris lateralis (extensor carpi radialis)
  2. Flexor carpi radialis
  3. Superficial digital flexor
  4. Flexor carpi ulnaris
  5. Deep digital flexor
Term
Action: extend carpus (3)
Definition
  1. Extensor carpi radialis
  2. Common digital extensor
  3. Lateral digital extensor

 

Term
Action: abduct carpal joint (1)
Definition
  1. Ulnaris lateralis (& support carpus)
Term
Action: flex digits (2)
Definition
  1. Superficial digital flexor (2-5)
  2. Deep digital flexor (1-5)
Term
Action: extend digits (2)
Definition
  1. Common digital extensor
  2. Lateral digital extensor
Term
Action: abduct first digit (1)
Definition
  1. Abductor digiti I longus
Term
Action: Supinate (rotate palmar surface medially) (2)
Definition
  1. Supinator
  2. Brachioradialis (Fe)
Term
Action: pronate (turn palmar surface laterally) (2)
Definition
  1. Pronator teres
  2. Pronator quadratus
Term
Action: flex metacarpophalangeal joint (1)
Definition
Interosseus muscles (also maintain angle of limb when bearing weight)
Term
Nerves, thoracic limb (7)
Definition
  1. Axillary
  2. Suprascapular
  3. Subscapular
  4. Musculocutaneous
  5. Radial
  6. Median
  7. Ulnar
Term
Nerve: axillary (3)
Definition
  1. Deltoideus
  2. Teres minor
  3. Teres major
Term
Nerve: suprascapular (2)
Definition
  1. Supraspinatus
  2. Infraspinatus
Term
Nerve: subscapular (1)
Definition
  1. Subscapularis
Term
Nerve: musculocutaneous (3)
Definition
  1. Coracobrachialis
  2. Biceps brachii
  3. Brachialis
Term
Nerve: radial (9)
Definition
  1. Triceps brachii
  2. Anconeus
  3. Brachioradialis (Fe)
  4. Extensor carpi radialis
  5. Common digital extensor
  6. Latearl digital extensor
  7. Ulnaris lateralis
  8. Abductor digiti I longus
  9. Supinator
Term
Nerve: median (5)
Definition
  1. Pronator teres
  2. Flexor carpi radialis
  3. Superficial digital flexor
  4. Deep digital flexor
  5. Pronator quadratus
Term
Nerve: ulnar (3)
Definition
  1. Flexor carpi ulnaris
  2. Deep digital flexor
  3. Interosseus muscles
Term
OINA: Trapezius
Definition
  1. Dorsal midline (C3-T9)
  2. Spine of scapula
  3. Accessory
  4. Elevate & abduct forelimb
Term
OINA: Rhomboideus (3 heads)
Definition
  1. Skull (capitis), dorsal midline (cervicis, thoracis)
  2. Dorsal border of scapula
  3. Cervical
  4. Elevate & abduct forelimb, hold scapula against trunk
Term
OINA: Serratus ventralis
Definition
  1. Transverse processes of C3-C7, first 7-8 ribs
  2. Serrated face of scapula
  3. Long thoracic
  4. Support trunk
Term
OINA: Superficial pectoral
Definition
  1. First 2-3 sternebrae
  2. Crest of greater tubercule of humerus
  3. Cranialpectoral (C7,C8)
  4. Adduct forelimb
Term
OINA: Deep pectoral
Definition
  1. Sternum, ventralpart
  2. Greater & lesser tubercule of humerus, medial brachial fascia
  3. Caudal pectoral, C8, T1
  4. Extend shoulder joint, advance body on fixed limb, draw limb caudally when not supporting ewight
Term
OINA: Omotransversarius
Definition
  1. Spine of scapula
  2. Wing of atlas
  3. Accessory
  4. Flex neck laterally, advance limb
Term
OINA: Brachiocephalicus (3 parts)
Definition
  1. Clavicular tendon
  2. Skull (cleidocephalicus mastoidea), dorsal midline (cleidocephalicus cervalicis), distal end of cranial border of humerus (cleidobrachialis)
  3. Accessory
  4. Fix neck (mastoid), bilaterally fix neck (cervalicis), draw limb forward (cleidobrachialis)
Term
OINA: Latissmus dorsi
Definition
  1. Lumbodorsal fascia & last 3 ribs
  2. Major teres tuberosity of humerus(forms conjoined tendon w/teres major)
  3. Thoracodorsal
  4. Draw free limb caudally (as in diggin)
Term
OINA: Deltoid
Definition
  1. Spine and acromial process of scapula
  2. Deltoid tuberosity of humerus
  3. Axillary
  4. Flex shoulder

 

Term
OINA: Teres minor
Definition
  1. Infraglenoid tubercule of scapula & caudal border of scapula
  2. Teres minor tuberosity of humerus
  3. Axillary
  4. Flex shoulder joint, rotate arm outward
Term
OINA: Supraspinatus
Definition
  1. Supraspinous fossa
  2. Greater tubercule of humerus
  3. Suprascapular
  4. Extend & stabilize shoulder
Term
OINA: Infraspinatus
Definition
  1. Infraspinous fossa
  2. Greater tubercule of humerus
  3. Suprascapular
  4. Stabilize shoulder, extend/flex shoulder
Term
OINA: Subscapularis
Definition
  1. Subscapular fossa of scapula
  2. Lesser tubercule of humerus
  3. Subscapular
  4. Stabilizes shoulder, adduct & extend shoulder
Term
OINA: Teres Major
Definition
  1. Caudal angle of scapula, subscapularis
  2. Major teres tuberosity of humerus
  3. Axillary
  4. Inward rotation & shoulder flexion
Term
OINA: Coracobrachialis
Definition
  1. Coracoid proces of scapula
  2. Crest of lesser tubercule of humerus
  3. Musculocutaneous
  4. Extend & adduct shoulder
Term
OINA: Triceps brachii
Definition
  1. Long Head Origin - caudal border of scapula
  2. Others origin - proximal 1/3 of caudolateral humerus
  3. Insertion - olecranon
  4. Nerve - radial

Action - extend elbow (long head also flexes shoulder)

Term
OINA: Anconeus
Definition
  1. Borders of olecranon fossa
  2. Proximal lateral ulna
  3. Radial
  4. Extend elbow joint
Term
OINA: Biceps brachii
Definition
  1. Supraglenoid tubercule of scapula
  2. Ulnar & radial tuberosities
  3. Musculocutaneous
  4. Flex elbow & extend shoulder
Term
OINA: Brachialis
Definition
  1. Proximo-lateral surface of humerus
  2. Ulnar  radial tuberosities
  3. Musculocutaneous
  4. Flex elbow
Term
OINA: Brachioradialis (Fe)
Definition
  1. Lateral humerus
  2. Antebrachial fascia
  3. Radial
  4. Supinate
Term
OINA: Extensor carpi radialis
Definition
  1. Lateral epicondyle of humerus
  2. Proximo-dorsal surface of Mc2 & Mc3
  3. Radial
  4. Extend carpus
Term
OINA: Common digital extensor
Definition
  1. Lateral epicondyle of humerus
  2. Extensor processes of distal phalanges (2-5 Ca, 1-5 Fe)
  3. Radial
  4. Extend digits & carpus
Term
OINA: Lateral digital extensor
Definition
  1. Lateral epicondyle of humerus
  2. Proximo-dorsal surface of distal phalanges (3-5 Ca, 2-5 Fe)
  3. Radial
  4. Extend digits & carpus
Term
OINA: Ulnaris lateralis (extensor carpi ulnaris)
Definition
  1. Lateral epicondyle of humerus
  2. Accessory carpal bone and proximo-lateral part of Mc5
  3. Radial
  4. Flex carpus, support carpus, abduct carpal joint
Term
OINA: Abductor digiti I longus
Definition
  1. Lateral & cranial border of ulna
  2. Proximo-cranial surface of radisu
  3. Radial
  4. Supinate
Term
OINA: Supinator
Definition
  1. Lateral epicondyle of humerus
  2. Proximo-cranial surface of radius
  3. Radial
  4. Supinate
Term
OINA: Pronator teres
Definition
  1. Medial epicondyle of humerus
  2. Middle part of medial border of radius
  3. Median
  4. Turn palmar surface of forepaw laterally
Term
OINA: Flexor carpi radialis
Definition
  1. Medial epicondyle of humerus
  2. Proximopalmar surface of Mc2 & mc3
  3. Median
  4. Flex carpus
Term
OINA: Superficial digital flexor
Definition
  1. Medial epicondyle of humerus
  2. Proximopalmar surface of middle phalanges 2-5
  3. Median
  4. Flex digits 2-5 & carpus
Term
OINA: Flexor carpi ulnaris (humeral & ulnar heads)
Definition
  1. Medial epicondyle of humerus (humeral head) & medial surface of olecranon (ulnar head)
  2. Accessory carpal bone
  3. Ulnar
  4. Flex carpus
Term
OINA: Deep digital flexor (humeral, radial, ulnar heads)
Definition
  1. Medial epicondyle of humerus (humeral head), middle 1/3 of radius (radial head), proximal 3/4 of ulna (ulnar head)
  2. Proximopalmar surface of distal phalax of each digit
  3. Ulnar & median
  4. Flex digits & carpus
Term
OINA: Pronator quadratus
Definition
  1. Apposed surfaces of radius & ulna
  2. Same as above
  3. Median
  4. Pronate forepaw
Term
OINA: Interosseus muscles
Definition
  1. Proximal metacarpals
  2. Proximal end of proximal phalanges 2-4
  3. Ulnar
  4. Flex metacarpophalangeal joint, maintain angle when limb bearing weight
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