Lab 3: Neck, Withers, Thorax Flashcards Preview

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Flashcards in Lab 3: Neck, Withers, Thorax Deck (25):
0

The superficial thoracic vein runs along the lateral edge of what muscle?

deep (or ascending) pectoral muscle (beneath the cutaneous trunci)

1

Insertion of rhomboideus thoracis muscle

scapular cartilage

2

Insertion of trapezius thoracis muscle

spin of scapula

3

At what vertebra does the funicular part of the nuchal ligament end?

T3

4

fx of supraspinous ligament

extends caudally from the funicular part of the nuchal ligament to connect the dorsal spinous processes and give rise to thoracolumbar fascia

5

fx of dorsoscapular ligament

helps keep the scapula attached to the body

6

parietal costal pleura lines what?

inside of the ribs

7

parietal diaphragmatic pleura lines what?

diaphragm

9

What major ligament lies beneath the rhomboideus thoracis m.?

dorsoscapular ligament

10

which muscles suspend the thorax between the limbs like a sling?

serratus ventralis thoracis and serratus ventralis cervicis

11

What nerves make up the brachial plexus?

ventral primary branches of C6-T2 (Majority is formed by branches of C7-T1)

12

What kind of lobation is present in horse lungs?

simple lobation

13

What does the L recurrent laryngeal nerve wrap around?

aortic arch

14

In which direction are the spinous processes of the thoracic vertebrae oriented?

dorsally and caudally

15

How do the spinous processes of adults differ from young animals?

They are capped by cartilage in young animals which subsequently ossifies (slow process in withers region)

16

How many ribs in the horse?

18 (correspond to the # of thoracic vertebrae). Each rib articulates dorsally with two contiguous vertebrae

17

What are "true" and "false" ribs?

True, aka sternal ribs articulate with the sternum by means of their costal cartilages (ribs 1-8). False, aka asternal ribs do not (ribs 9-18).

18

fx of costal groove in ribs

caudal groove on medial surface for passage of intercostal vessels and nerve

19

fx of xiphoid process and cartilage

point of attachment for diaphragm and linea alba

20

Origin, Insertion, Action, Supply of Brachiocephalicus Cleidomastoideus m.

O: Clavicle
I: Mastoid process
A: Unilateral-advances limb or turns head
S: Accessory, axillary, and cervical nerves

21

O/I/A/S of Brachiocephalicus cleidobrachialis m.

O: clavicle
I: crest of humerus
A: bilateral-flexes head and neck
S: Accessory, axillary, and cervical nerves

22

O/I/A/S of sternocephalicus m.

O: manubrium of sternum
I: ramus of mandible
A: unilateral-turns head and neck, bilateral-flexes head and neck
S: ventral br. of accessory n.

23

O/I/A/S of Trapezius cervicis

O: funiculus nuchae
I: spine of scapula
A: elevate/advance scapula
S: dorsal br. of accessory n.

24

O/I/A/S of Trapezius thoracis m.

O: supraspinous ligament
I: spine of scapula
A: elevate/retract scapula
S: dorsal br. of accessory n.

25

what forms the line of pleural reflection? Why is it clinically significant?

where the parietal costal pleura and parietal diaphragmatic pleura meet. Represents the dividing line between the pleural and peritoneal cavities.

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