Chapter 10 Flashcards
origin of the erector spinae?
= sacrum/iliac crest
Epax. Muscle: Superficial Layer
called the erector spinae
Iliocostalis
Erector Spinae Origin = sacrum/iliac crest Insertion = ribs
Longissimus
Origin = sacrum/iliac crest Insertion = transverse processes longissimus, describing shape of the muscle, longest muscle in body, sacrum to the skull
Transverso-spinalis
Origin = sacrum/iliac crest & transverse processes Insertion = spinous processes -most medial
three divisions of the hypx. muscle
Body Wall Prevertebral Limbs (later lecture) (Usually do not receive intervation from dorsal rami )
what are the subdivions of the body wall (hypx. muscle)
Abdominal Thoracic Perineal (holding in celomic space Neck(no celomic space unlike others)
intermediate layer of the epaxial muscle: Multifidus
Origin = sacrum/iliac crest Insertion = articular processes & spinous processes
intermediate layer of the epaxial muscle: Semispinalis
Origin = transverse processes Insertion =spinous processes
what does superior epax relate to intermediate layer or epax. muscle?
superficial longer, deeper-shorter
Deep Layer Of epaxial muscle
Short slips of muscle, connecting adjacent vertebrae
slide 13
understand anatogonist, lateral flexion
abdominal
external oblique, internal oblique, transversus
Superficial = external abdominal Oblique
Origin: Lower 8 ribs Insertion: top of rectus sheath
Intermediate = Internal Oblique
Origin: Iliac crest Insertion: Rectus sheath
Deep = Transversus
Origin: Thoracolumbar fascia, overlies expanxial musclature.Insertion: Sheath deep to the abdominus rectus
limbs usually do not recieve intervation from the dorsal or ventral rami? imp. concept
it is hypaxial musculature, does not recieve intervation from the dorsal rami
the external oblique and internal oblique are generally what to each other?
perpendicular, external oblque down like pockets, internal like thumb
why are the abdominal muscles in several directions?
strong in different directions, fiber directions show where it is strong
how are the superior abdominal muscle (ext. abdominal oblique)?
origin is the lower rib, insertion is at the top of the rectus, general rule is pelvis is usally where things originate and insert more superior, this
what are Subdivision of the Thoracic Group?
Externalintercostal/InternalIntercostal/Transversus thoracis
the three body wall sub divisions, abdominal , thoracic, and perineal are all what to each other?
homo, the superfical layers,the intermediate and deep are all homo to each other
the intercostals and abdominals muscles go the same fiber direction?
yes! besides the transverese throacic which is kind of spiderwebby, spread out radically
all deep layers of perional abdominal and intercostals all are what?
have to do something with transverse
Perineal Group,Superficial
Urogenital Diaphragm (External Anal Sphincter concious control//Deep Transverse Perineal)
Subdivision of the Perineal Group/Intermediate
Pelvic Diaphragm:- Coccygeus- Levator ani
Subdivision of the Perineal Group/Deep
Transversalis Fascia/Deteriots as you get older, consistent deepest layer,
Subdivision of the Neck Region, whats left?
Scalenes are what are left
The Diaphragm was originally what?
hypaxial cervical musculature
how did the diaphragm move down?
Heart above your headto throaic, heart pushes diaphragm then ends up down, removed it from cervical region
strap muscles: rectus abdominis
Paired muscle, location and shape/Rectus straight muscle of the abdomin/ Strap like muscles, plevis to head, muscles here are homo. To each other
what is a rectus sheath?
Sheath of connective tissue, surrounding muscle fibers of rectus abdominos
where does the rectus sheath meet?
left and right are meeting at midline at the lina alba in between rectus abdominos where sheaths meet each other
Geniohyoid,
Named after origin and insertion/Genu( chin) inserting to hyoid (hyoid muscle)
rectus sheath fibers go which way
no consistent, extra support on the outside, move tendons all on the superficial aspect
arculate line in the abdominos does what?
marks charge deep leaf of rectus sheath, go to the superficial aspect of the abdominoal muscles , inferior
Strap musclesRectus Series/Omohyoid
Sholder-hyoid, can depress hyoid
Strap muscles/Rectus Series/Sternohyoid/Sternothyroid
Different insertions, different actions, two different muscles/Even though they have same origin
name three Prevertebral Musculature (On the anterior aspect of your transvere processes, deep inside)
Longus capitis/Longus colli/Quadratus lumborum
longus capitis(lateral to longus colli)
origin: cervical vertbrae insertion:base of skull
longus colli
origin: bodies of vertbrae from throac/insertion:onto your cervical vertbrae for neck
Quadratus lumborum
short of rectangular in shape/ abduct vertebral column, depresses rib 12 origin:iliac crest, lower lumbar verterbrae I: T12,l1-4,rib 12
Attaches to pubic bone, is what quad?
Cranial/Ventral:(Superior/Anterior)
Attaches to Ischium, is what quad?
Caudal/Ventral/Inferior/Anterior)
Attaches to upper part of ilium is what quad? iliac crest, medial surface of ilium, ant, ilium spine
Cranial/Dorsal
attaches the shaft/body of the illium and the lateral surface of the illium, out to the sides
Caudal/Dorsal –Inferior/Posterior)
