Hypaxial Muscles Flashcards
Superficial and deep fascia of the trunk
super: covers the thorax and abdomen subcutaneously
deep: thoracolcolumnbar fascia
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.
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
The serratus ventralis (cervicis and thoracis) m.
Origin?
Insertion?
Innervation
Origin:
Insertion: Serrated face of
scapula
Innervation: Long
thoracic nerve
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.
The intercostal muscles
Innervation?
Innervation: intercostal nn.
The external intercostal mm.
Action* (bolded)
Action: Inspiration; draws the ribs together so as to enlarge the thoracic cavity
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.
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
The rectus abdominis muscle
Origin
Insertion
Action
It also flexes the thoracolumbar part of the vertebral column
The linea alba
Midventral raphe that consists of fused
thoracolumbar fascia and aponeuroses
of abdominal muscles
The superficial inguinal ring
Aponeurosis of external abdominal
oblique separates into two parts which
then come together
The Deep Inguinal Ring
ccc
The inguinal canal (Page 90)
External opening of very short natural
passageway through abdominal wall
The vaginal process in the male and female
Blind extension of peritoneum protrudes
through inguinal canal to subcutaneous
position outside body wall
