Lab 13 Thoracic Limb Learning Issues Flashcards

1
Q

should joint stability

A

no collateral ligaments on shoulder joint; the tendons of subscapularis and infraspinatus take their place; stability also provided via medial and lateral stablizers

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2
Q

medial shoulder stablizers

A

subscapularis

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3
Q

lateral shoulder stabilizers

A

supraspinatus, infraspinatus, and teres minor (not main lateral stabilizer)

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4
Q

cephalic vein

A

located in lateral pectoral groove between brachiocephalicus and pectorals descendent; runs along cr aspect of the limb dorsally (brachium) then to a medial position between elbow and carpus (antebrachium)

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5
Q

collateral ulnar artery

A

arises from cd surface of brachial artery about 5cm distal to deep brachial

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6
Q

transverse cubital artery

A

arises from cranial surface opposite cubital lymph nodes and disappears under biceps

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7
Q

subscapular artery

A

arises from axillary and passes proximally between subscapularis and teres major

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8
Q

pectoral muscles

A

originate from the sternum
superficial pectorals
deep pectorals
subclavius

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9
Q

subclavius

A

insertion on sternum; loose insertion on scapular fascia and the proximal part of supraspinatus

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10
Q

deep pectorals

A

attaches to sternum and has medial and lateral insertions on humerus

  • md insertion is cr pt of lesser tubercle
  • lateral insertion becomes aponeurotic as it crosses over inter tubercular groove to attach to cr pt of greater tubercle
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11
Q

superficial pectorals attachment and innervation

A

origin- first 2 sternebrea usually part of 3rd
insertion- whole crest of greater tubercle of the humerus
innervation- ventral branches spinal nerves C7/C8

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12
Q

superficial pectorals action

A

adduct limb when it is not bearing weight or prevent the limb from being abducted when bearing weight

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13
Q

deep pectoral muscles attachment and innervation

A

origin- ventral part of sternum and fibrous raphe between fellow muscles, deep abdominal fascia in region of xiphoid cartilage
insertion- major portion partly musclar, partly tendinous on lesser tubercle of humerus, an aponeurosis to greater tubercle and its crest, cd part to medial brachial fascia
innervation- cd pectoral nerves (C8, T1)

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14
Q

deep pectoral muscles fx

A

when limb is advanced and fixed in supporting position: pull trunk crly and extend shoulder jt; when limb not supporting weight draw limb cdly and flex shoulder jt, adduct limb

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15
Q

extrinsic limb muscles

A

rhomboideus, serratus ventralis, latissimus dorsi, brachiocephalicus, trapezius, omotransversarius

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16
Q

rhomboideus

A

attachments-Nuchal and dorsoscapular ligaments, C2-T8 to scapular cartilage
innervation- lateral branches of dorsal branches of cervical spinal nerves= motor

17
Q

serratus ventralis

A

attachments- transverse processes of certical vertebrea (C4-C7) and first 8-9 ribs to dorsomedial scapula
innervation- lateral branches of dorsal branches of cervical spinal nerves= motor

18
Q

latissimus dorsi

A

attachments- thoracolumbar fascia to teres major tuberosity (md humerus)
innervation- lateral branches of dorsal branches of cervical spinal nerves= motor

19
Q

brachiocephalicus attachments and innervation

A

attachments: crest of humerus to mastoid process of skull
innervation: ventral branch of Accessory Nerve

20
Q

trapezius attachments and innervation

A

attachments: funicular portion of nuchal ligament to scapular spine
Innervation: dorsal branch of accessory nerve

21
Q

omotransversarius attachments and innervation

A

attachments- shoulder fascia to transverse processes of cervical vertebrea (C2-C4)
innervation:dorsal branch of accessory nerve

22
Q

tendon of origin of biceps brachii

A

passes from supraglenoid tubercle through inter tubercle groove, tendon is partly cartilaginous and closely molded to intermediate tubercle in groove; intertubercular bursa lies between tendon of insertion of biceps brachii and the inter tubercle groove; )
- tendon contributes to passive stay apparatus

23
Q

intertubercle bursa and shoulder jt

A

the bursa does not communicate with shoulder joint (most of the time) so if medicating joint and bursa need to do two separate injections

24
Q

how does tendon of biceps brachii contribute to passive stay apparatus?

A

avoids shoulder flexion

25
how does venous blood drain in thoracic forelimb
via cephalic or subclavian vein
26
path of arterial blood flow through collateral ulnar artery
1. axillary 2. brachial 3. collateral ulnar artery 4. Medial and lateral palmar metacarpal