Skeletal Muscles Flashcards
Origin
stationary attachment to bone
Insertion
Movable attachment to bone
Facial Expressions
Origin: Cranial Bones
Insertion: Dermis
Action: Moves Skin with contraction
Nerves: Facial Nerve 7
Eye
Origin: orbit surface Insertion: sclera of eye Action: Moves Eye Nerves: CN 6 CN4 CN3
Mastication
moves mandible at the TMJ
Nerve: CN 5- Trigeminal
Tongue
Names end in “-glossus”
Nerve 12 Hypoglossal Nerve
Orbicularis Oris
Action: Purses Lips
CN 7
Orbicularis Oculi
Closes Eye
CN 7
Occipitofrontalis
wrinkles forehead, raises eyebrows, tense scalp
CN 7
Zygomaticus Major/Minor
Smile
CN7
Levator Labii Superioris
depresses lower lip
CN 7
Buccinator
compresses cheeks
CN7
Mentalis
Protrude lower lip
CN7
Platysma
tense skin of neck
CN7
Superior Rectus
Looks superiorly
CN3- oculumotor
Inferior rectus
Looks inferiorly
CN3- oculumotor
Medial Rectus
Looks medially
CN3- oculumotor
Lateral Rectus
Looks laterally
CN6- abducens
Superior Oblique
Eye Roll inferiorly
CN4- trochlear
Inferior Oblique
Eye Roll superiorly
CN3- oculumotor
Mastication
Temporalis Internal/External Pterygoid Masseter CN5- trigeminal Actions: Elevation/Depression Protrude/ Retract Lateral movement
Anterior Neck
Sternocleidomastoid
Actions: Control larynx position, create foundation for muscle of tongue
Tongue
All muscles end in “-glossus”
CN 12- hypoglossus
Moves food within mouth to prepare for swallowing
Vertebral
Erector Spinae- “I like Spaghetti”
Iliocostalis/Longissimus/Spinalis
Action: Extension, laterla flexion, rotation
Quadratus Lumborum
Flexor of spine
Abdominals
Transversus Abdominis
Internal Oblique
External Oblique
Rectus
Diaphragm- Phrenic Nerve
Rectus Abdominis- Linea Alba
Perineum (Pelvic Floor)
Flex sacrum & coccyx
Pectoralis Major
Origin: Sternum & Clavicle
Insertion: Greater tubercle
Movement at the shoulder
Deltoid
Insertion: Deltoid Tuberosity
Movement at the shoulder
Rotator Cuff Muscles
Supraspinatus
Infraspinatus
Subscapularis
Teres Minor
Supraspinatus
Origin: Supraspinous Fossa
infraspinatus
Origin: Infraspinatous Fossa
Subscapularis
Subscapular Fossa
Biceps Brachii
Origin: coracoid Process
Insertion: radial Tuberosity
Elbow flexor
Triceps Brachii
Elbow Extensor
origin: Humerus
Insertion: Olecranon process
Flexor Carpi Ulnaris
Origin: Medial Epicondyle
Wrist Flexion & ulnar deviation
Flexor Carpi radialis
Origin: Medial epicondyle
wrist Flexion & Radial deviation
Pulmaris Longus
wrist flexor
Gluteus Maximus
Origin: Iliac Crest
Insertion: Gluteal Tuberosity & IT Band
Hip Extensors & Abductors
Gluteus Medias
origin: Iliac crest
Insertion: greater tuberosity
Hip extensor & abductor
Piriformis
Origin: anterior sacrum
Insertion: Greater trochanter
Quadriceps Group
Rectus Femoris: Origin @ Anterior Inferior Iliac Spine
Vastus Lateralis
Vastus Intermedius
Vasts Medialis
Hip flexion & Knee extension
all share a the same insertion: tibial Tuberosity
Psoas
Psoas Major: origin @ TP of T1-L5
Insertion: lesser trochanter
Hamstrings
Biceps Femoris: Insertion @ fibular head
Semimebranousis: Insertion @ Medial Tibia
Semitendinosus: Insertion @ Pes Anserine
Common origin @ Ischial Tuberosity
Tensor Fascia Latae (IT Band)
On the Hips Origin: ASIS & Iliac Crest Insertion: IT Band IT- Iliotibial Band, side of thigh Hip extensor & abductor
Sartorius
Hip Flexion & Knee extensions
Origin: ASIS
Insertion: Pes Anserine
Gracilis
Inner thigh
Hip adductor
Insertion: Pes Anserine
Gastrocnemius
calf
Origin: femoral condyle
Insertion: Calcaneal tendon
Soleus
Insertion: calcaneal tendon
Tibialis Anterior
Dorsiflex ankle
Extensor Digitorum Longus
Digits 2-5
Dorsiflex toes
Fibularis Longus
Plantarflex foot