AP Lab Exam 3

Epicranius frontalis- raises and lowers eyebrows

Muscle and function?

Epicranius occipitalis- raises and lowers eyebrows

Muscle and function?

Orbicularis oculi- closes eye

Muscle and function?

Orbicularis oris- kissing

Muscle and function?

Levator labii superioris- raises upper lip

Muscle and function?

Levator Labii Superioris

What muscle can you feel contract superiorly along the upper lip and side of the nose when you make a steer face?

Zygomaticus major- smile

Muscle and Function? (Blue arrow)

Zygomaticus minor- smile

Muscle and Function (Red arrow)

Zygomaticus

What muscles can you feel contracting in the cheek when you smile?

Risorius- pulls corners of the mouth laterally

Muscle and Function?

Risorius

What muscle can you feel contracting at the corner of your mouth when it's pulled laterally?

Buccinator- pulls corners of the mouth laterally

Muscle and Function?

Buccinator

what muscle contracts when you whistle or use a trumpet?

Depressor anguli oris- frowning

Muscle and Function?

Depressor labii inferioris- pout

Muscle and Function?

Mentalis

What muscles cause the chin to pucker when pouting?

Temporalis- closes mouth

Muscle and Function?

Temporalis

What muscle can you feel contracting above the ear when you open and close your mouth?

Masseter- opens mouth

Muscle and Function?

Sternohyoid- depresses hyoid when speaking

Muscle and Function? (deep and wide)

Omohyoid- Depresses hyoid

Muscle and Function? (superficial and narrow)

Sternocleidomastoid- - flexes and rotates head

Muscle and Function

Sternocleidomastoid

What muscles can you feel contracting when the head flexes?

Head turns opposite way

If one of the sternocleidomastoid muscles is flexed what happens?

Scalenes- flexes and rotates head and raises first 2 ribs when breathing

Muscle and Function? (anterior, middle and posterior)

Levator scapulae- elevate scapula, extend head, laterally flex head

Muscle and Function?

Splenius- Extends head, flexes and rotates head

Muscle and Function?

Semispinalis capitis- Extends and hyperextends head, rotates head

Muscle and Function?

External oblique- lateral flexion and rotation of trunk, compresses abdomen

Muscle and Function?

Bending side

When flexing the external oblique which muscle contracts when flexing laterally?

Internal oblique- lateral flexion and rotation of trunk, compresses abdomen

Muscle and Function? (deep)

Transverse abdominis- Compresses abdomen

Muscle and Function? (deepest)

Rectus abdominis- Flexes trunk, compresses abdomen

Muscle and Function?

Rectus Abdominis

What muscles contract above the umbilicus when you lead forward in a chair?

External intercostals- lifts rib cage during inhale

Muscle and Function?

External intercostal

What muscles can you feel contracting between two ribs when inhaling?

Internal intercostals- brings ribs closer together, forceful exhale

Muscle and Function?

Pectoralis major- Flexion, adduction and medial rotation of the humerus

Muscle and Function?

Pectoralis major

What muscle can be felt flexing in the anterior axillary (armpit) when adducting the arm?

Pectoralis minor- pulls scapula forward and down, elevates ribs during deep inhale

Muscle and Function?

Serratus anterior- external rotation of the scapula

Muscle and Function?

Serratus Anterior

What muscles can you feel flex inferior to the axillary (armpit) when doing wall push ups?

Erector spinae- lateral flexion extension and hyperextension of trunk

Muscle and Function?

Longissimus dorsi- lateral flexion extension and hyperextension of trunk

Muscle of the Erector Spinae and Function?

Iliocostalis- lateral flexion extension and hyperextension of trunk

Muscle of the Erector Spinae and Function?

Spinalis- lateral flexion extension and hyperextension of trunk

Muscle of the Erector Spinae and Function?

Trapezius- elevates and depresses scapula, pulls scapula medially, hyperextends head

Muscle and Function?

Rhomboid major- Adducts Scapula

Muscle and Function?

Rhomboid minor- Adducts scapula

Muscle and Function?

Latissimus dorsi- Adduction, medial rotation, and extension of humerus

Muscle and Function?

latissimus dorsi

What muscles contract in the lower back when the arm adducts

Serratus posterior- Pulls ribs inferiorly and posteriorly, rotation and extension of lower trunk

Muscle and Function?

Deltoid- Abducts arms

Muscle and Function?

Deltoid

What muscles can you feel contracting in the upper shoulder when the arms are abducted?

Supraspinatus- Abducts arm

Muscle and Function?

Infraspinatus- lateral rotation of the humerus

Muscle and Function

Subscapularis- Medial rotation of the humerus

Muscle and Function?

Teres major- adduction, medial rotation, and extension of humerus

Muscle and Function

Teres minor- Abducts humerus, lateral rotation of humerus

Muscle and Function?

Biceps brachii- flexes elbow, supinates forearm, shoulder flexion

Muscle and Function

Biceps Brachii

What muscle contains the Brachial Artery used for measuring blood pressure?

Brachialis- flexes elbow

Muscle and Function

Coracobrachial- adducts and flex humerus

Muscle and Function?

Triceps brachii- Extends forearm

Muscle and Function

Pronator teres- pronates forearm

Muscle and Function

Pronator teres

What muscle defines the edges of the Antecubital fossa in the elbow pit?

Flexor carpi radialis- Flexes wrist, abducts hand

Muscle and Function?

Palmaris longus- flexes wrist, tightens palm skin

Muscle and Function?

Flexor carpi ulnaris- flexes wrist

Muscle and Function?

Flexor carpi ulnaris

What muscle causes tendons to protrude when the wrist is flexed and the hand is in a fist?

Flexor digitorum superficialis- flexes wrist and middle fingers

Muscle and Function?

Flexor digitorum superficialis

What muscles tighten the anterior wrist when flexing the fingers upward?

Flexor digitorum profundus- flexes distal phalanges, flexion of wrist

Muscle and Function?

Flexor pollicis longus- flexes thumb

Muscle and Function?

Pronator quadratus- pronates forearm

Muscle and Function?

Anconeus- extension of forearm

Muscle and Function?

Supinator- supinates forearm

Muscle and Function

Brachioradialis- flexes forearm

Muscle and Function?

Brachioradialis

What muscle can you feel protruding when you flex your lateral forearm against resistance?

Extensor digitorum longus- extends wrist, extends phalanges, abducts fingers

Muscle and Function?

Extensor digitorum longus

what muscles cause the tendons in your middle three fingers to protrude when the fingers are spread and the wrist is hyperextended?

Extensor carpi radialis longus- extends wrist, abducts wrist

Muscle and Function?

Extensor carpi radialis brevis- extends wrist, abducts wrist

Muscle and Function?

Extensor digiti minimi- extends little finger

Muscle and Function?

Extensor carpi ulnaris- extends and adducts wrist

Muscle and Function?

Abductor pollicis longus- abducts thumb, extends thumb

Muscle and Function?

Extensor pollicis longus- Extends thumb

Muscle and Function?

Anatomical snuff box

When the hand is pronated and fingers are spread apart what is the triangle depression by the thumb?

Extensor pollicis brevis- extends thumb

Muscle and Function

Extensor indicis- extends index finger

Muscle and Function?

Psoas major- flexes thigh, flexes trunk

Muscle and Function

Iliacus- Flexes hip, flexes trunk

Muscle and Function

Gluteus maximus- extends and abducts thigh, laterally rotates hip

Muscle and Function

Gluteus Maximus

SA What muscles contract when you return to a standing position from squatting?

Gluteus medius- Abduction and Medial rotation of thigh

Muscle and Function? (deep)

Gluteus minimus- abduction and medial rotation of thigh

Muscle and Function? (deepest)

Piriformis- abduction and lateral rotation of thigh

Muscle and Function? (deep)

Superior Gemellus- abducts and laterally rotates thigh

Muscle and Function? (deep)

Inferior Gemellus- abducts and laterally rotates thigh

Muscle and Function (deep)

Obturator Externus- laterally rotate thigh

Muscle and Function