Mammalian Anatomy Practical 3

Neck muscles and skull bone features and some cranial nerves.

Sternohyoid

Insertion: Lower border of the hyoid bone

Innervation: Ansa Cervicalis

Note that stylohyoid is superior to the digastric muscle, and thin. This image is for a human.

Stylohyoid

Insertion: Body of the hyoid bone

Innervation: Facial Nerve (CN07)

Observe how the omohyoid is directly lateral to the sternohyoid

Omohyoid

Insertion: Lower border of the body of the hyoid bone

Innervation: Branches of spinal nerves (C01-C03)

Digastric

Insertion: Common tendon onto the hyoid bone

Innervation: Trigeminal nerve (CN05), mylohyoid branch (anterior belly) + Facial nerve (CN07), digastric branch (posterior belly)

Mylohyoid

Insertion: Body of the hyoid bone

Innervation: Trigeminal nerve (CN05) and mylohyoid branch

Masseter

Insertion: Ramus of mandible

Innervation: Trigeminal nerve (CN05), mandibular branch (superficial and deep masseter)

U

Temporalis

Insertion: Coronoid process and anterior ramus of mandible

Innervation: Trigeminal nerve (V), mandibular branch

Cleidomastoid

Insertion: Lateral surface of the mastoid process

Innervation: Accessory nerve (CN11); branches from the anterior divisions of nerves C02 and C03

Sternomastoid

Insertion: Lateral surface of the mastoid process

Innervation: Accessory nerve (CN11); branches from the anterior divisions of nerves C02 and C03

Buccinator

Buccinator

Insertion: Orbicularis oris

Innervation: Facial nerve (VII), buccal branch

Sternothyroid

Insertion: Oblique line of the thyroid cartilage

Innervation: Ansa cervicalis

Thyrohyoid

Insertion: Hyoid bone

Innervation: Anterior ramus of C1, via the hypoglossal nerve (CN12)

Medial Pterygoid

Insertion: Ramus and angle of the mandible

Innervation: Trigeminal nerve (CN05), mandibular branch

Lateral Pterygoid

Insertion: Condyle of mandible

Innervation: Trigeminal nerve (V), mandibular branch

Jugular vein

Internal (1)

External (2)

1, E and J

Carotid artery

J - Common

1 - Internal

E - External

Superior sagittal sinus

Inferior sagittal sinus

Transverse sinus

Thyroid gland

Yellow Region

Cerebrum (The largest portion of the brain, there are still lobes within the cerebrum)

Blue region

Cerebellum

Blue lobe

Frontal lobe

Green lobe

Parietal lobe

Yellow lobe

Temporal lobe

Pink lobe

Occipital lobe

J

Longitudinal fissure

Z

Transverse fissure

2

Olfactory bulbs

8

Optic Chiasm

48

Pituitary gland

20

Corpora quadrigemina - superior colliculus

D

Corpora quadrigemina - inferior colliculus

22

Corpus callosum

U

Fornix

E

Pineal body

6 (number is upside down, below U)

Thalamus

1 (on left of U)

Hypothalamus

30 (bottom right corner of image)

Septum pellucidum

Brain ventricles to know:

1st, 2nd, 3rd, 4th ventricles

12, 16, and S

Brain stem:

1) Midbrain (12)

2) Pons (16)

3) Medulla oblongata (S)

27

Spinal cord

I (Olfactory + bulbs)

II (Optic)

III (Oculomotor)

IV (Trochlear)

V (Trigeminal)

VI (Abducens)

(The Trochlear (IV) crosses over this nerve)

VII (Facial)

VIII (Vestibulocochlear)

IX (Glossopharyngeal)

X (Vagus)

XI (Accessory)

XII (Hypoglossal)

D

Sclera

E

Choroid

K

Retina

S

Ciliary Body

H

Cornea

X

Iris

V

Lens

U

Optic nerve

Macula

Fovea

J

Pupil

Vitreous Humor;

The gel-like substance filling the space between the lens and the retina in the eye, providing support and maintaining the shape of the eyeball.

17

Anterior Chamber-Aqueous Humor;

The fluid-filled space between the cornea and the iris, containing aqueous humor that nourishes and maintains intraocular pressure.

Green region

Maxillary Sinuses

Blue region

Frontal sinuses

Purple region

Ethmoid sinuses

Orange region

Sphenoid sinuses

External acoustic meatus

Nasal bone

Frontal bone

Superior nasal conchae

Middle nasal conchae

Maxilla

Zygomatic bone

Mandible

Ethmoid bone

Palatine bone

Sphenoid bone

Name (of these holes) and Cranial nerve passing through?

Optic canal- optic nerve (CN II)

Mental protuberance

Name and Cranial nerve passing through?

Superior orbital fissure- oculomotor nerve (CN III), trochlear nerve (CN IV), trigeminal nerve (V), and abducens nerve (CN VI)

Parietal bones

Temporal bone

Zygomatic arch

Zygomatic process

Outlined in green

Coronal suture

Not the bone but the suture

Squamous suture

Mastoid process

Condylar process

Green region

Ramus of mandible

Mandibular foramen

Coronoid process

Name and Cranial nerve passing through?

Mental foramen- trigeminal nerve (V)

Teeth

Outlined in green

Sagatittal suture

Outlined in red

Lambdoid suture