231 Lab 5

BIOL 231 Lab 5
Intro & Review

Multiple Choice

The motor neuron does not directly touch the muscle fiber it innervates

• True

• False

Multiple Choice

Which bone marking is NOT found on the humerus

• Trochlear notch

• Medial Epicondyle

• Intertubercular Groove

• Captitulum

Multiple Choice

Which muscle is highlighted in yellow?

• Flexor Carpi Radialis

• Pronator Teres

• Palmaris Longus

• Extensor Carpi Radialis

Multiple Choice

The muscles on the anterior portion of the forearm are most likely to be what type of muscles?

• Flexors

• Extensors

Multiple Choice

An origin at the posterior surface of the proximal humerus and insertion at the olecranon process of the ulna would likely have an action of what?

• Flexion at shoulder

• Extension at wrist

• Flexion at elbow

• Extension at elbow

​Common Mistakes on Worksheets

Feature = Bone Marking.
So Bone was Humerus, and the feature was the intertubercular groove.


Articulation = Joint (typically named after the bones moving at that location)

OI&A: Simplify this for yourself and see what would happen if you moved the insertion towards the origin without the origin moving. Be sure to include the action and what is moving.

What are we covering today?

​Bones & Muscles of the head (skull), torso and Pelvis

​ Braincase V Facial Bones

​Use the colored skull to learn the bones but be able to answer on the plain skull.

Pectoral Girdle - bones hold arm to thorax
Ribs - head, neck & shaft
- True, False & Floating
Sternum - Fusion of three smaller bones

​

​Vertebral Column & Rib Cage

Multiple Choice

The arrow is pointing at what structure on the scapula?

• Superior Angle

• Infraspinous Fossa

• Acromion

• Coracoid Process

Eat Breakfast at 7,
Eat Lunch at 12 &
Eat dinner at 5

​

​Vertebrae

Male v. Female Pelvis

The question on the worksheet is about the pelvises in Complete Anatomy. However, there are real ones out on the table for you to see in person. Please keep them over the cusions (we don't want them to break) the male is notated.

Muscles of the Head

A = Occipitofrontalis
B = Temporalis
C = Orbicularis Oculi
D = Orbicularis Oris
E = Zygomaticus Major
F = Zygomaticus Minor
G = Masseter
H = Buccinator

​A

​B

​F

​C

​D

​E

​H

​G

(this is in the supplemental lab manual)

Muscles of the Neck

Muscles of the Anterior Thorax

​Deltoid
Subs = Subscapularis
TM = Teres Major
SA = Serratus Anterior

Use the direction of muscle fibers to determine which layer you are looking at.

Also drawn on board.

​

Abdominal Muscles

Muscles of the Posterior Thorax

SS = Supraspinatus
IS = Infraspinatus
TM = Teres Major
tm = Teres Minor
SA = Serratus Anterior

Blue: Semispinalis Capitis

Yellow: Splenius Capitis

Green: Iliocostalis Lumborum

Red: Iliocostais Thoracis

Purple: Longissiums Thoracis

Black: Spinalis Thoracis

​
"I love Spaghetti" - See Board for more info

​Deep Back Muscles
(aka Erector Spinae Group)

Multiple Choice

An erector spinae muscle that is directly next to the spine and the body is in the thoracic region would likely be called what?

• Longissimus Thoracis

• Spinalis Thoracis

• Illiocostalis Capitus

• Spinalis Capitus

​In addition to the normal lab manual, there is a supplementary one with more images and information. Some of these list the OI & A, you do not need to know those. It is just to help you picture the muscle.

Look at the vertebrae & Answer Questions 2A, 3 & 4

Look at Bones/Bone Markings & Answer Questions 1 & 2

Station 1 (by the door)

Stations This Week

Station 2 (back/door side)

Station 3 (both tables by window)

Look at the muscles & Answer Questions 5, 6 & 7