Muscle Insertions, Origins & Actions - All

Created by crayzotter 

Upgrade to
remove ads

68 terms

Erector spinae
- spinalis, longissimus, iliocostalis
(A only)

A:
Together - extend vertebral column
One - lateral flexion

Splenius:
- capitis
- cervicis
(A only)

A: Together - extend neck
One - laterally flex neck to same side

transversospinalis:
- multifidis
- rotators
- semispinalis
(A only)

A:
slight extensions, delicate adj. to vertebral column

Trapezius

O - occipital bone
- spinous processes C7-T12
I - clavicle & scapula
A - varies: elevate, retract, depress scapula, extend neck

Levator scapulae

O - C1-4 transverse processes
I - vertebral border of scapula
A - scapular elevation

Rhomboid major & minor (A only)

A - scapular elevation, downward rotation

Pectoralis minor (A Only)

A - depress shoulder, downward rotation of scapula

Serratus anterior

O - ribs 1-8
I - vertebral border of scapula
A - protract shoulder, upward rotation

Pectoralis major

O - clavicle, sternum, ribs 2-6
I - greater tubercle, intertubercular sulcus
A - shoulder flexion, adduction, medial rotation

Deltoid

O - clavicle & scapula
I - deltoid tuberosity
A - shoulder abduction, flexion & extension, medial & lateral rotation

Teres major

O - scapula
I - intertubercular sulcus of humerus
A - shoulder extension, adduction, medial rotation

Latissimus dorsi

O - inferior T & al L vertebrae, ribs 8-12
I - Intertubercular sulcus
A - shoulder extension, adduction, medial rotation

Infraspinatus

O - infraspinous fossa
I - greater tubercle
A - shoulder lateral rotation

Teres minor

O - lateral border of scapula
I - greater tubercle
A - shoulder lateral rotation

Supraspinatus

O - supraspinous fossa
I - greater tubercle
A - shoulder abduction

Subscapularis

O - subscapular fossa
I - lesser tubercle
A - shoulder medial rotation

Biceps brachii

O - 2 heads:
- long head - supraglenoid tubercle
- short head - coracoid process
I - radial tuberosity
A - shoulder & elbow flexion

Triceps brachii

O - 3 heads:
- long head - superior humerus
- lateral head - posterior humerus
- medial head - posterior humerus
I - olecran of ulna
A - shoulder & elbow extension, shoulder adduction

Brachialis

O - distal humerus
I - ulnar tuberosity
A - elbow flexion

Brachioradialis

O - lateral epicondyle of humerus
I - styloid process of radius
A - elbow flexion

Coracobrachialis

O - coracoid process of scapula
I - medial humerus
A - shoulder flexion, adduction

Flexor carpi radialis

O - medial epicondyle of humerus
I - metacarpal
A - wrist flexion, abduction

Flexor carpi ulnaris

O - medial epicondyle of humerus
I - capals & metacarpals
A - wrist flexion, adduction

Pronator quadratus (A only)

A - forearm pronation

Palmaris longus

O - medial epicondyle of humerus
I - palm aponeurosis
A - wrist flexion

Extensor carpi radialis longus

O - supracondylar ridge of humerus
I - 2nd metacarpal
A - wrist extension, abduction

Extensor carpi ulnaris

O - lateral epicondyle of humerus
I - 5th metacarpal
A - wrist extension, adduction

Gluteus maximus

O - iliac crest, sacrum, coccyx
I - iliotibial tract, gluteal tuberosity
A - hip extension, lateral rotation

Gluteus medius

O - ilium & gluteal lines
I - greater trochanter of femur
A - hip abduction, medial rotation

Psoas major

O - T12-L5
I - lesser trochanter
A - hip flexion

Tensor fasciae latae

O - iliac crest & spine
I - proximal lateral tibia via iliotibial tract
A - hip flexion, medial rotation

Rectus femoris

O - iliac spine
I - tibial tuberosity
A - hip flexion, knee extension

Vastus lateralis

O - greater trochanter, linea aspera
I - tibial tuberosity
A - knee extension

Vastus medialis

O - linea aspera
I - tibial tuberosity
A - knee extension

Vastus intermedius

O - anterior & lateral femoral surface
I - tibial tuberosity
A - knee extension

Sartorius

O - iliac spine
I - medial tibia
A - lateral rotation, knee flexion

Gracilis

O - pubic ramus
I - medial tibia
A - hip adduction, medial rotation

Pectineus

O - ramus of pubis
I - lesser trochanter
A - adduction & medial rotation of hip

Adductor longus

O - ramus of pubis
I - linea aspera of femur
A - adduction, flexion & medial rotation of hip

Adductor magnus

O - ramus of pubis
I - linea aspera of femur
A - adduction, flexion, medial & lateral rotation of hip

Biceps femoris

O - long head - ischial tuberosity
- short head - linea aspera
I - lateral tibia & fibula
A - hip extension, knee flexion

Semimembranosus & semitendinosus

O - ischial tuberosity
I - medial condyle of tibia
A - hip extension, knee flexion, medial rotation

Tibialis anterior

O - lateral tibia
I - 1st metatarsal & medial cuneiform
A - ankle dorsiflexion, inversion

Extensor digitorum longus

O - lateral tibia & fibula
I - middle & distal phalanges 2-5
A - interphalangeal extension (splaying toes)

Peroneus (fibularis) longus

O - lateral tibia & fibula
I - 1st metatarsal & medial cuneiform
A - ankle plantarflextion, intertarsal eversion (ankle outwards)

Gastrocnemius

O - condyles of femur
I - calcaneus via calcaneal tendon
A - plantarflexion & inversion

Soleus

O - head of fibula
I - calcaneus via calcaneal tendon
A - plantarflection

Rectus abdominus

O - pubic bone
I - cartilage ribs 5-7, xiphoid process
A - flex vertebral column, depress ribs, compress abdomen
**RESPIRATION**

External oblique

O - ribs 5-12
I - iliac crest, linea alba
A - flex vertebral column, depress ribs, compress abdomen
**RESPIRATION**

Internal oblique

O - iliac crest, thoracolumbar fascia
I - inferior ribs, xiphoid process
A - flex vertebral column, depress ribs, compress abdomen

Transversus abdominis

O - cartilage ribs 6-12, iliac crest, thoracolumbar fascia
I - linea alba, pubis
A - compress abdomen

Diaphragm

O - xiphoid process, costal cartilage ribs 6-12, lumbar vertebrae
I - centreal tendon
A - expand thoracic cavity
**RESPIRATION**

Internal intercostals (A only)

A - depress ribs

External intercostals (A onlye)

A - elevate ribs

Orbicularis oculi

O - medial orbit
I - eyelid skin
A - close eye

Orbicularis oris

O - maxilla & mandible
I - lips
A - compress, purse lips

Buccinator

O - alveolar process of maxilla & mandible
I - orbicularis oris
A - compress cheeks

Zygomaticus major & minor

O - zygomatic
I - angle of mouth, upper lip
A - draw corners of mouth up, angle

Occipitofrontalis (frontalis)

O - galea aponeurotica
I - skin of eyebrows, nose, occipital bone
A - raise eyebrows, wrinkle forehead sklin

Platysma

O - 2nd rib & scapula
I - mandible
A - tense skin of neck, depress mandible

Temporalis

O - temporal bone
I - coronoid process
A - mastication

Masseter

O - zygomatic arch
I - ramus of mandible
A - mastication

Digastric

O - chin, mastoid process
I - hyoid
A - elevate larynx, depress mandible

Stylohyoid

O - styloid process
I - hyoid
A - elevate hyoid

Myohyoid

O - mandible
I - hyoid
A - elevate oral floor, depress mandible

Sternohyoid

O - clavicle & manubrium
I - hyoid
A - depress larynx & hyoid

Sternothyroid

O - sternum
I - thyroid cartilage (larynx)
A - depress larynx & hyoid

Sternocleidomastoid

O - sternum, clavicle
I - mastoid process (temporal)
A - bilateral: flex neck
- unilateral - rotate head to opposite side

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set