231 LAB 7 INTRO

Nervous System
Unit 3
We've almost made it!

• Use Pipe cleaners to explore where each passageway starts/ends.

• We use pipe cleaners to mark passageways for questions

• Nerves & blood vessels go through the skull at various locations.

• You need to know their names AND what travels through them

Passageways

Skull Features

​Lobes of the brain

Cerebrum: areas of higher brain function
Corpus Callosum: joins the white matter regions from the L&R cerebrum.
Fornix: memory formation
Septum Pellucidum (sp): membrane that separates the two lateral ventricles

​Thalamus: directs incoming & outgoing information
Hypothalmus(Hth): regulation of unconcious activity

Structures of the brain:

Pineal gland(p): produces melatonin that regulates body rhythyms
Superior colliculus (sc): paired structure involved in visual reflexes.
Inferior colliculus (ic): paried structure involved in auditory reflexes.
Mammillary body (mb): memory formation
Optic Chiasm (co): optic nerves cross
Pituitary Gland (pit): produce hormones
Cerebellum: coordinates motor control

Structures of the brain:

Multiple Choice

What is the function of the inferior colliculus?

• Visual Reflex

• Auditory Reflex

• Produce Melatonin

• Memory Formation

You need to know:
The roman numeral

The full name

If it carries Motor information, Sensory information or both

Where it enters the skull

​

​Cranial Nerves

Multiple Choice

All cranial nerves carry motor and sensory information for their target.

• True

• False

Circle of Willis

Deox Blood

Multiple Choice

What is found in the Superior Sagital Sinus?

• Oxygenated Blood

• Deoxygenated Blood

• Cerebrospinal fluid

Ventricles of the Brain:
Lateral Ventricles (1&2)
3rd Ventricle
Aqueduct
4th Ventricle

Arachnoid Matter
More delicate, attached to Dura

Dura Matter
Tough & Fibrous

Meninges of brain

Pia Matter
Very delicate, fused to the nervous tissue and can't be removed

• Dorsal root (posterior in CA) brings in sensory information

• Ventral root (anterior in CA) carries out motor information

• Fuse together to make the spinal nerve

• Dorsal Ramus (posterior in CA) supplies deep back & skin

• Ventral Ramus (anterior in CA) supplied the anterolateral body wall & appendages

Spinal Cord

Multiple Choice

Which of the following only carries motor information?

• Dorsal Ramus

• Dorsal Root

• Ventral Ramus

• Ventral Root

Today's Lab

Station 1: Skulls (Activity 1)
Center Table: Human Brains - BE RESPECTFUL (Activity 2)
Station 2: Brain Models (Activity 2 Cont.)
Center Table: Sheep Brains (Activity 3)
Station 3: Spinal Cord Model (Activity 4)
Practice Practical