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Flashcards in Hypaxial Muscles Deck (17)
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1

Superficial and deep fascia of the trunk

super: covers the thorax and abdomen subcutaneously

deep: thoracolcolumnbar fascia

2

The longus capitis muscle
Action* (bolded)
Innervation

Action: To flex the atlanto-occipital joint and to draw the neck
ventrally.

Innervation: ventral branches of the cervical spinal nerves.

3

The scalenus muscle
Action?

Action: To flex the neck. In unilateral action, to bend the neck laterally, lateral flexion.
When the neck is fixed, the dorsal part can act in inspiration

4

The serratus ventralis (cervicis and thoracis) m.
Origin?
Insertion?
Innervation

Origin:

Insertion: Serrated face of
scapula

Innervation: Long
thoracic nerve

5

The serratus dorsalis cranialis muscle
Action
Innervation
Origin
Insertion

Origin: Thoracolumbar fascia deep to
rhomboideus

Insertion: Craniolatral surfaces
of ribs

Action: It lifts the ribs for inspiration.

Innervation: intercostal nn.

6

The intercostal muscles
Innervation?

Innervation: intercostal nn.

7

The external intercostal mm.
Action* (bolded)

Action: Inspiration; draws the ribs together so as to enlarge the thoracic cavity

8

The internal intercostal muscles
Action?? not sure two actions?
Innervation?

Action: Expiration, to draw the ribs together so as to narrow the thoracic cavity

Innervation: In general - ventral branches of the thoracic and lumbar spinal

nerves. Refer to Fig 3 – 6, pp 102 of the lab manual for details.
Action: Compression and support of the abdominal viscera.

9

The external and internal abdominal oblique muscle

rectus abdominis m.

transversus abdominis m.

Origin
Insertion

Action: Compression and support of abdominal
viscera
-RA m.: also flexes thoracolumbar part
of vertebral column

Innervation:Ventral branches of
thoracic and lumbar
spinal nerves

10

The rectus abdominis muscle
Origin
Insertion
Action

It also flexes the thoracolumbar part of the vertebral column

11

The linea alba

Midventral raphe that consists of fused
thoracolumbar fascia and aponeuroses
of abdominal muscles

12

The superficial inguinal ring

Aponeurosis of external abdominal
oblique separates into two parts which
then come together

13

The Deep Inguinal Ring

ccc

14

The inguinal canal (Page 90)

External opening of very short natural
passageway through abdominal wall

15

The vaginal process in the male and female

Blind extension of peritoneum protrudes
through inguinal canal to subcutaneous
position outside body wall

16

The inguinal ligament

Caudal border of aponeurosis of
external abdominal oblique

17

The vascular lacuna

-base of femoral triangle
-space that contains femoral vessels
that run to and from hindlimb