WSU BIO 315: Lab 1 Exam; WEEK 3 TERMS

Flexor digitorum profundus

Deep inside arm, white strands in the cadaver, inserts on the distal phalanges

External Intercostal Muscles

Slant downward and forward between ribs- like putting your hands in your front pocket. Elevate ribs when you breathe in.

Internal Intercostal Muscles

Slant downward and outward. Depress ribs when you forcefully breathe out.

External Oblique Muscle

Slants same direction as external intercostal muscles.

Inguinal Ligament

BQ: What is the thick inferior edge of the oblique aponeurosis.

Hint: "V line"

Internal Oblique Muscle

Slants the same direction as internal intercostals muscles.

Transversus Abdominis

Fascicles run horizontally

Aponeuroses

BQ: Strong flat tendons are called ____________.

Linea Alba

-Division

"White line" where the abdominal muscles fuse

Rectus Abdominis

Fascicles run vertically, 6 pack of abs.

Tendinous Intersections

They break the "six pack" muscle into segments.

Rectus Sheath

Underneath the rectus abdominis muscles.

Pectoralis Major

Attaches the humerus to the clavicle and sternum.

Pectoralis Minor

Attaches scapula to the ribs.

Serratus Anterior

Think saw, like teeth. Attaches the medial border of the scapula to the ribs.

Trapezius Muscle

Attaches pectoral girdle to the vertebral column.

Descending Part of the Trapezius Muscle

Red in the picture, closest to neck

Transverse Part of the Trapezius Muscle

Yellow in the picture, middle piece

Ascending Part of the Trapezius Muscle

Pink in the picture, very bottom of trapezius

Latissimus Dorsi Muscle

Lats, "wings"

Rhomboid Major Muscle

Triangle shaped on the back, underneath trapezius

Rhomboid Minor Muscle

Y shaped on the back, underneath trapezius

Levator Scapulae Muscle

Branch off of the rhomboid minor, attaches the scapula to cervical vertebrae. Think shoulder shrugs.

Deltoid Muscle

Shoulder muscle, upside down delta (triangle)

Teres Major Muscle

In your armpit area

Supraspinatus Muscle

Fills the supraspinous fossa

Infraspinatus Muscle

Fills the infraspinous fossa

Teres Minor Muscle

On the lateral border of the scapula

Subscapularis Muscle

Fills the subscapular fossa

Supraspinatus, infraspinatus, teres minor, subscapularis

BQ: Know 2 of the 4 Rotator Cuff Muscles

Erector Spinae Muscles

Make the spine erect after it has been flexed

Spinalis Muscle

Medial part of erector spinae, attaches to spinous processes

Longissimus Muscle

Intermediate part of erector spinae, attaches to transverse process of vertebrae

Iliocostalis Muscle

Lateral part of erector spinae, attaches to ribs

Spinalis, Longissimus, Iliocostalis

BQ: Know 2 of the 3 parts of the erector spinae muscle

Splenius Capitis Muscle

Attaches the posterior of the skull to the vertebral column, bow tie shaped

Platysma Muscle

Tenses the skin of the neck

Sternocleidomastoid Muscle

Helps bend the neck and rotate the head

Digastric Muscle

Sides, underneath the chin, yellow in the pic

Mylohyoid Muscle

Sits in between the digastric muscles, purple in the pic

Sternohyoid Muscle

On both sides of the throat

Sternothyroid Muscle

Red in the picture

Thyrohyoid Muscle

Closest to the head of all the infrahyoid muscles

Omohyoid Muscle

Makes L shapes from neck to shoulders

Superior Belly of the Omohyoid Muscle

Thicker part of the Omohyoid Muscle

Inferior Belly of the Omohyoid Muscle

Thinner part of the Omohyoid Muscle

Occipitofrontalis Muscle

Attaches to and moves the scalp

Frontal Belly of the Occipitofrontalis Muscle

Forehead

Occipital Belly of the Occipitofrontalis Muscle

In the posterior scalp

Orbicularis Oculi Muscle

Around the eyelids

Orbicularis Oris Muscle

Around the lips

Buccinator Muscle

In the area of dimples

Zygomaticus Major Muscle

Covers zygomatic arch

Masseter Muscle

Clench your teeth, and you can feel this muscle flex

Temporalis Muscle

Temples, elevates and retracts the mandible

Coracobrachialis Muscles

BQ: Attachments are in the name, what connects the pectoral muscles to the biceps.

Biceps Brachii Muscles

Collective structure with two parts

Long Head of the Biceps Brachii

Shorter head of the bicep

Short Head of the Biceps Brachii

Longer head of the bicep

Brachialis Muscles

Flexes forearm at elbow joint

Triceps Brachii Muscle

Collective structure, three heads, back of the arm

Long Head of the Triceps Brachii

The only head that attaches to scapula, bottom, thick

Medial Head of the Triceps Brachii

Under the two other heads, in the middle

Lateral Head of the Triceps Brachii

BQ: Prominent in Body Builders.

Pronator Teres Muscle

Forearm Muscles: 1

Flexor Carpi Radials Muscle

Forearm Muscles: 2

Palmaris Longis Muscle

BQ: About 20% of people don't have one.

Forearm Muscles: 3

Flexor Carpi Ulnaris Muscle

Forearm Muscles: 4

Flexor digitorum superficalis muscle

Thick slab, intermediate layer, inserts on medial phalanges

Flexor Pollicis Longus muscle

Flexes thumb, very deep inside the body

Pronator Quadratus Muscle

Pronates forearm, inside of the wrist

Brachioradialis Muscle

BQ: Attaches the humerus to the radius.

1

Extensor carpi radialis longus muscle

Extends wrist

2

Extensor carpi radialis brevis muscle

Extends wrist

3

Extensor Digitorum Muscle

In line with your middle finger, looks like guitar strings

4

Extensor Carpi Ulnaris muscle

Extension of wrist and adduction of hand, on pinky side

5

Supinator

Wraps around the top of the radius bone

Abductor Pollicis Longus Muscle

Takes thumb away from palm

1

Extensor Pollicis Brevis

Tendon right next to abductor

3

Extensor Pollicis Longus

Tendon next to EP brevis

2

Diaphragm Muscles

A dome-shaped, muscular partition separating the thorax from the abdomen

Sternocostal Part of the Diaphragm Muscle

Top edge of diaphragm

Lumbar Part of the Diaphragm Muscle

Bottom edge of diaphragm

Central Tendon of the Diaphragm

Shiny line separating the two sections of the diaphragm

Esophageal Hiatus of the Diaphragm

Probe in the diaphragm from bottom to top

Caval Opening of the Diaphragm

Probe in the diaphragm from top to bottom, blue in the pic

Psoas Major Muscle

Flexes upper thigh

Psoas Minor Muscle

BQ: 40% of people do not have one.

Iliacus Muscle

Fills the iliac fossa

Iliopsoas Muscle

The psoas major and iliacus muscles fuse in the upper thigh

Quadratus Lumborum

Spans the gap between the 12th rib and iliac crest, behind kidneys

Pelvic Diaphragm Muscle

BQ: Forms the floor of the pelvic cavity. Very important muscle because it supports the pelvic organs.

External Anal Sphincter

Voluntary muscle to go #2

Gluteus Maximus Muscle

Largest single muscle in the body

-Big flap

Gluteus Medius Muscle

Small flap, middle gluteal

Gluteus Minimus Muscle

Most deep and smallest of gluteal

Tensor Fasciae Latae Muscle

Behind IT band

Iliotibial Tract

IT band

Piriformis Muscle

Pear shaped, passes through the greater sciatic notch to attach on the greater trochanter

Quadratus Femoris Muscle

Attaches to the ischial tuberosity and hip joint