Module 1
what muscle is this?
o: 1)posterior surfaces of the medial and lateral condyles of the femur
i: 1) calcaneus via the calcaneal tendon
gastrocnemius
Which 3 muscles have these same actions:
1) flex the knee at the tibiofemoral joint
2) extend the hip at the coxal joint
3) tilt the pelvis posteriorly
semitendinosus, semimembranosus, biceps femoris
What are the four rotator cuff muscles?
1) supraspinatus
2)infraspinatus
3)teres minor
4)subscapularis
which muscle insertion is the mastoid process of the temporal bone and the lateral portion of the superior nuchal line of the occiput?
sternocleidomastoid
What is the o & i of the pectoralis major?
o: 1) medial 1/2 of the clavicle 2)sternum 3)costal cartilage of ribs 1-6
i: crest of greater tubercle of the humerus
O: 1) proximal posterior surface of the tibia 2) posterior aspect of head of fibula
i: 1) calcaneus via the calcaneal tendon
soleus
The 3 hamstrings all share an origin, what is it?
ischial tuberosity
*the biceps femoris has two heads, the origin of the long head is the ischial tuberosity, the origin of the short head is the lateral lip of linea aspera
Why is Teres major called "lats little helper" (What makes teres major a synergist to latissimus dorsi?)
both muscles share the actions:
1)medially rotate the shoulder at GH joint
2) adducts the shoulder at GH joint
3) extends the shoulder at GH joint
(origins are TVPs of: C3-6, C2-7, C6-7)
scalenes
o: posterior iliac crest
i: 12th rib and TVPs of L1-4
a:1) elevates the pelvis at the lumbosacral joint 2)extends the vertebral column at the spinal joints
3)laterally flexes the vertebral column at the spinal joints
4) fixes the 12th rib during forced inhalation and exhalation
quadratus lumborum
What muscle is this?
O: 1) lateral condyle of the tibia 2) proximal anterior shaft of fibula 3) interosseous membrane
i: middle and distal phalanges of 2nd -5th toes
extensor digitorum longus (EDL)
sciatic
what 3 muscles insert at the greater tubercle of the humerus?
1) supraspinatus
2) Infraspinatus
3) Teres Minor
using your reasoning and not your book, what are the actions of this muscle:
o: 1) inferior 1/2 of ligamentum nuchae
2) SP of C7-T4
i: 1)mastoid process 2) lateral portion of superior nuchal line
A: 1) extends the head and neck
2)rotates the head and neck to the same side
3)laterally flexes to the same side
what is the o & i of rectus abdominis?
o: 1)pubic crest 2)pubic symphysis
i: 1)cartilage of 5th-7th ribs 2) xiphoid process
Which muscle is this?
O: 1) lateral condyle of tibia 2)proximal lateral surface of the tibia 3) interosseous membrane
i: 1) medial cunieform and the base of the first metatarsal
tibialis anterior
femoral
what is the o, i & innervation of the brachioradialis muscle?
o: proximal 2/3 of lateral supracondylar ridge of humerus
i: styloid process of the radius
n: radial
what is the o, i & innervation of levator scapulae
o: TVPs of C1-C4
i: medial border of the scapula, between the superior angle and the superior portion of the spine of the scapula
n: cervical and dorsal scapular
what is the o, i, and innervation of the diaphragm?
o: 1)inner surfaces of lower 6 ribs 2)xiphoid process 3) upper 2-3 lumbar vertebrae
i: central tendon of the diaphragm
n: phrenic
Which two muscles make up the stirrup muscles?
fibularis longus & tibialis anterior
Rectus Femoris
O: AIIS
i:tibial tuberosity
How can you use this information to figure out the actions? What are the actions?
actions:
1) flex the hip at the coxal joint
2) extend the knee at the tibiofemoral joint
what is the o, i and innervation of the triceps brachii muscle?
o: long head: infraglenoid tubercle of the scapula
lateral and medial head: posterior surface of the humerus
i: olecranon process of the ulna
n: radial
the trapezius and the deltoids share an attachment, what is it?
deltoids origin is the same as trapezius insertion:
1) lateral 1/3 of the clavicle 2)acromion process 3) spine of the scapula
which two muscles insert at the lesser trochanter of the femur?
iliacus and psoas major