General anatomy Myology Flashcards
What muscles make up the Rotator Cuff?
SITS- Supraspinatus, Infraspinatus, Teres Minor, Subscapularis
Supraspinatus Action
Infraspinatus Action
S: ABduction
I: external rotation
Supraspinatus & Infraspinatus: Nerve S., Blood S., Origin/insertion
N: Suprascapular
B.S: Suprascapular
O.I: fossa of scapula/ greater tubercle of humerus
Teres minor: Nerve, Blood S., O/I, Action
B.S: scapular circumflex
N: Axillary
A: external rot.
O.I: lat. border dorsal scapula/ greater tubercle of humerus
Subscapular: Nerve, Blood, O/I, Action
N: subscapular
B: lat. thoracic, subscapular
A: Internal rot.
O.I: subscapular fossa of scapula/ lesser tubercle of humerus
Latissimus Dorsi: Nerve, Blood, Action
N: thoracodorsal
B: descending scapular
A: extension, int. rot. of arm
Trapezius: Nerve, Blood, Action
N: Spinal acc.
B: descending scapular
A: Adduct scapula
Rhomboid: nerve, blood, action, O/I
N: Dorsal scapular
B: descending scapular
A: scapular retraction
O/I: SP of C7 & T1 (minor); SP of T2-T5 (major)/ Scapula (both)
Serratus Ant.: Nerve, Blood, Action
N: long thoracic
B: descending scapular
A: adheres scapula to chest wall
Deltoid: Nerve, Blood, Action, O/I
N: descending scap
B: Axillary
A: ABduction of arm
O/I: trap, clavicle, acromion, spine of scapula/ deltoid tuberosity of humerus
Teres Major: Nerve, Blood, Action
N: subscapular
B: descending scap
A: ext. med. rot. ADDucts arm
Pec. Major: Nerve, Blood, Action
N: medial pectoral
B: descending scap
A: draws sacpula forward
what muscles make up the post. compartment of the Arm? Nerve, Blood, Action, O/I
Triceps & Anconeus N: Radial B: Brachial A: extension O/I: olecranon process of the ulna
What muscles make up the Ant. compartment of the Arm?
Biceps brachaii brachialis brachioradialis coracobrachialis pronator teres
what nerve supplies the Biceps Brachii, brachialis, coracobrachialis? Brachioradialis? Pronator Teres?
Musculocutaneous
Radial
Median
What is Blood supply of Biceps Brachii, brachialis, coracobrachialis, Brachioradialis? Pronator Teres?
Brachial
Ulnar
Common action of Biceps Brachii, brachialis, coracobrachialis?
flexes elbow
O/I of biceps brachii?
Short head: O: Coracoid process
Long head: O: supraglenoid tubercle of scapula
I: radial tuberosity
Forearm Ant. Compartment muscles
- Biceps brachii
- flex. radialis
- flex carpi ulnaris
- flex dig. prof.
- pronator teres
- flex pollicis long
- palmaris longus
Nerve supply of ant. comp. forearm:
- Biceps brachii
- flex. radialis
- flex carpi ulnaris
- flex dig. prof.
- pronator teres
- flex pollicis long
- palmaris longus
- musculocutaneous
2,5,6,7: median - ulnar
- 1/2 median, 1/2 ulnar
Blood supply of ant. comp. forearm:
- Biceps brachii
- flex. radialis
- flex carpi ulnaris
- flex dig. prof.
- pronator teres
- flex pollicis long
- palmaris longus
Ulnar
Common action of ant. comp. forearm:.
flexion
post. compartment forearm muscles?
- Ext. carpi radialis longus
- brevis
- ext. carpi ulnaris
Nerve supply post. compartment forearm muscles?
- Ext. carpi radialis longus
- brevis
- ext. carpi ulnaris
1,2: radial
3. post. interosseus
Blood supply post. compartment forearm muscles?
- Ext. carpi radialis longus
- brevis
- ext. carpi ulnaris
Ulnar
Action of post. compartment forearm muscles?
- Ext. carpi radialis longus
- brevis
- ext. carpi ulnaris
1,2: extends & ABducts wrist
3: extends 7 ADDucts wrist
Levator Ani ie?
floor pelvic cavity
Levator Ani Nerve, blood, action, O/I?
N: pudendal plexus
B: int. pudendal, inf. rectal
A: constricts rectum & vagina cavity
O/I: Pubis, ischial spine/ coccyx
Shortest muscle in the body?
stapedius
longest muscle in the body?
sartorius
what makes up the quadriceps?
rectus femoris
vastus lateralis
vastus medialis
vastus intermedius
what makes up the ant. compartment of thigh?
- rectus femoris
- vastus lateralis
- vastus medialis
- vastus intermedius
- sartorius
- iliopsoas
nerve & blood supply of the ant. compartment of thigh?
N: Femoral
B: Femoral
what makes up the “tailors muscle”?
rectus femoris, sartorius
Common insertion of quads?
patella
Common action of ant. compartment of thigh?
- rectus femoris
- vastus lateralis
- vastus medialis
- vastus intermedius
- sartorius
- iliopsoas
flexion (1,5,6) & extension (2,3,4)
muscles of medial compartment of thigh?
- adductors
- gracilis
- pectineus
Nerve/ blood supply
- adductors
- gracilis
- pectineus
N: 1,2:obturator; 3. femoral (some obturator)
B: obturator
Common action of med. comp. of thigh
- adductors
- gracilis
- pectineus
ADDucts
what are the Adductors?
magnus, longus, brevis
what does the pectineus overlie?
Add. brevis, & longus
what are the “hamstrings” or post. comp. of thigh?
- biceps femoris
- semitendinosus
- semimembranosus
Nerve/ blood supply of hamstrings?
N: tibial
B: deep femoral
actions of hamstrings
- biceps femoris
- semitendinosus
- semimembranosus
- flex and lat. rot knee, extends thigh
2,3. flex and med. rot. knee, extends thigh
O/I of hamstrings
- biceps femoris
- semitendinosus
- semimembranosus
- long: ischial tuberosity; short: linea aspera/ fibula
2, 3: ischial tub./ tibia
lateral comp. of thigh muscles?
- TFL
- Glut medius, minimus
- Glut max.
Nerve/ Blood supply of lat. comp. thigh
- TFL
- Glut medius, minimus
- Glut max.
B: Inferior gluteal
N: 1,2: sup. gluteal
3.: Inferior Gluteal
Ant. comp. of leg muscles?
- tibialis ant.
- ext. dig. longus
- ext. hallucis longus
Nerve/ Blood supply of Ant. comp. of leg muscles?
- tibialis ant.
- ext. dig. longus
- ext. hallucis longus
N: deep peroneal aka: ant. tibial
B: anterior tibial
Common action of Ant. comp. of leg muscles?
- tibialis ant.
- ext. dig. longus
- ext. hallucis longus
dorsiflexion
post. comp. of leg muscles?
- gastrocnemius
- soleus
- popliteus
- plantaris
nerve/blood supply of post. comp. leg
- gastrocnemius
- soleus
- popliteus
- plantaris
N: tibial
B: posterior tibial
Common action of post. comp. leg
- gastrocnemius
- soleus
- popliteus
- plantaris
plantar flexes foot
lat. comp. of leg muscles? Nerve/Blood supply, Action, O/I?
peroneus longus, peroneus brevis N: superficial peroneal (Fibular) B: anterior tibial/ peroneal A: plantar flex & evert foot O/I: lat. tibia-fibula/ med. cuneiform & base of 1st metatarsal
Myoblasts?
embryonic mesoderm: smooth or cardiac muscle
makes muscle
mesodermal “blocks” (somites)?
skeletal muscle: embryonic mesoderm
Skeletal histology
striated; multi-nucleated
cardiac histology
striated
uni-nucleated at the intercalated discs
smooth: spindle shaped with central nuclei
Agonistic?
prime movers
synergistic?
supports movement
antagonistic
opposite movers
internal organs begin to form?
2nd month
efferent cranial nerves develop?
basal plate
thymus gland develops from?
3rd pharyngeal pouch
pharyngeal tonsil develops from?
2nd pharyngeal pouch